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单词 stem
释义
stem1 nounstem2 verb
stemstem1 /stem/ ●●○ noun [countable] Word Origin
WORD ORIGINstem1
Origin:
Old English stefn, stemn
Examples
EXAMPLES FROM THE CORPUS
  • But the plant continually produces new stalks through the year, so there always should be some new stems to pick.
  • It looked like something pulled from the earth, a tuberous stem or fungus esteemed by gourmets.
  • It produces small, fragrant flowers that cluster on older stems.
  • The stem is thin and rooted.
  • You can try anything from a single stem to a braided bunch with Antenna's new collection of flowery Monofibre extensions.
word sets
WORD SETS
abbr., abbreviate, verbabbreviation, nounabstract noun, nounaccusative, nounactive, adjectiveadj., adjective, nounadv., adverb, nounadverbial, adjectiveaffix, nounantecedent, nounapposition, nounarticle, nounaspect, nounattributive, adjectiveaux., auxiliary, nounauxiliary verb, nouncase, nouncausal, adjectiveclause, nouncollective noun, nouncommon noun, nouncomparative, adjectivecomparison, nouncomplement, nouncomplex, adjectivecompound, nounconcord, nounconcrete noun, nounconditional, adjectiveconditional, nounconj., conjugate, verbconjugation, nounconjunction, nounconnective, nounconstruction, nouncontinuous, adjectivecontraction, nouncoordinate, adjectivecoordinating conjunction, nouncopula, nouncountable, adjectivecount noun, noundative, noundeclension, noundefinite article, noundemonstrative, adjectivedemonstrative pronoun, noundependent clause, noundeterminer, noundirect discourse, noundirect object, noundirect speech, noundisjunctive, adjectiveditransitive, adjectivedouble negative, noun-ed, suffixending, noun-est, suffix-eth, suffixfeminine, adjectivefinite, adjectiveform, nounfunction word, nounfuture, adjectivegender, noungenitive, noungerund, noungradable, adjectivegrammar, noungrammarian, noungrammatical, adjectivehistoric present, nounhomonym, nounhomophone, nounimperative, adjectiveimperative, nounimpersonal, adjectiveindefinite article, nounindependent clause, nounindicative, nounindicative, adjectiveindirect discourse, nounindirect object, nounindirect speech, nouninfinitive, nouninflect, verbinflected, adjectiveinflection, noun-ing, suffixintensifier, nouninterjection, nouninterrogative, adjectiveinterrogative, nounintransitive, adjectivelinking verb, nounmain clause, nounmasculine, adjectivemodal, nounmodal auxiliary, nounmodal verb, nounmodifier, nounmodify, verbmood, nounn., neuter, adjectivenominal, adjectivenominative, nounnon-finite, adjectivenon-restrictive, adjectivenoun, nounnumber, nounobject, nounparse, verbparticipial, adjectiveparticiple, nounparticle, nounpartitive, nounpart of speech, nounpassive, adjectivepassivize, verbpast, adjectivepast participle, nounpast perfect, nounperfect participle, nounperiphrasis, nounpersonal pronoun, nounphrasal verb, nounphrase, nounpl., plural, nounplural, adjectiveplurality, nounpossessive, adjectivepossessive, nounpredeterminer, nounpredicate, nounpredicative, adjectiveprefix, nounprefix, verbprep., preposition, nounprepositional phrase, nounpres., present participle, nounprogressive, adjectivepronominal, adjectivepronoun, nounproper noun, nounpunctuate, verbpunctuation, nounqualifier, nounquantifier, nounquestion tag, nounreflexive, adjectiveregular, adjectiverelative clause, nounrelative pronoun, nounreported speech, nounrestrictive clause, nounroot, nounrule, nounrun-on sentence, nounsecond person, nounsemicolon, nounsentence, nounsentence adverb, nounsingular, adjectivesolecism, nounsplit infinitive, nounstative, adjectivestem, nounsubject, nounsubjective, adjectivesubjunctive, nounsubordinate clause, nounsubstantive, nounsuffix, nounsuperlative, adjectivesyntactic, adjectivesyntax, nountag, nountense, nountransitive, adjectiveuncountable, adjectivev., variant, nounverb, nounverbal, adjectivevocative, noun
Collocations
COLLOCATIONS FROM OTHER ENTRIES
(=one that divides and repairs the body, and may be used in medical treatment)· Stem cells may make life-saving treatment possible.
 I tied a towel round his leg to try to stem the flow of blood.
 an attempt to stem the flow of refugees across the border
COLLOCATIONS FROM THE CORPUSADJECTIVE
· Serpentine layering Climbers such as clematis, jasmine, wisteria and honeysuckle root wherever their long pliable stems touch the soil.· They are borne on long, wiry stems.· Description: The leaves are arranged in two rows on long, trailing stems.· The long stems are thin and branched.· They have very long, firm stems.· The plant is very bushy, and with long stems grows tall.· Description: Light or bright green, oval or oblong, small leaves which grow close together on long stems.· It sends forth long, trailing stems with leaves up to the water surface, where they float.
· Its rigid main stem needs no support, even when loaded with flowers and pods.· Prune lateral shoots of wisteria if not done already, by cutting back to four or five leaves from the main stems.· A leader is a main or central stem that extends and grows along its own line of growth.· Only occasionally does it become necessary to cut out main stems, such as when they become old, gnarled and barky.· A well defined form According to my dictionary, a tree can be any perennial plant having a self-supporting woody main stem.· Many branches are produced on the main stems.· Multi-sprouting will induce more main stems which produce a larger number of small tubers.
· You can try anything from a single stem to a braided bunch with Antenna's new collection of flowery Monofibre extensions.· These grow naturally as a single, vertical stem and need absolutely no pruning.· These four varieties are ideal small garden plants, as they grow on a single stem and don't need pruning.· Those grown as cordons are trained on a single stem tied to wires attached at an angle.· A cordon is no more than a single stem which fruits all the way along.· A single stem planted on its own does not create a good effect.· The standard rose is really a bush rose growing on a single stem.
· A delicate looking plant with much branched slender stems and dainty powder blue flowers.· The slender stems, like those of the crinoids are not preserved here.· Dark green bristly foliage arranged in dense whorls around slender brittle stems.· They are arranged on a slender, branching stem.
· Records retrieved only under strong stems would not be given high weight.· One could use rules of thumb about thresholds below which the search would be automatically repeated using strong stems.
NOUN
· The Gateway itself is situated deep in the brain stem.· The cerebellum, atop the brain stem, has many more, thanks to so many little granule cell neurons.· The internal state of the organism is monitored by means of receptors, mostly situated in the brain stem.· His head injury had damaged his brain stem.· This input is fed to certain parts of the brain stem and filtered.· There is another diffusely broadcasting group of neurons scattered along the centerline near the surface of the brain stem.· For a diagnosis of brain stem death irremediable structural brain damage should be present.· Two thumbtack-size patches of neurons located on the brain stem are particularly loaded with adenosine receptors.
· As the cells proceed from the stem cell to the various mature blood cell types they divide many times.· On this occasion it is stem cell research.· Somewhere in the middle of the conflicting forces Bush must decide whether stem cell research should get federal funding.· The stem cells at the heart of the matter are to be found in human embryos a few days old.· Further studies are directed towards the understanding of the role which the stem cell control factor DIA/LIF plays in the normal embryo.· However, removing the stem cells kills the embryo, and therefore has serious ethical implications.· Replacement is dependent on the continued multiplication of immortal stem cells.· All the cells in the blood come, remarkably, from just one special progenitor cell - the multipotential stem cell.
VERB
· Once flowers are over, cut the faded stems back to ground level.· Only occasionally does it become necessary to cut out main stems, such as when they become old, gnarled and barky.· When established, cut its stems to ground level in winter.· Use scissors to cut the carnation stem lengthwise into three.
· At the cemetery, I noticed how each rose grew on a shark-infested stem.· The eye grows out from the stem to become a bud.· These four varieties are ideal small garden plants, as they grow on a single stem and don't need pruning.· The leaf-stalks grow opposite from the stem.· The points where the leaves grow on the stems are known as nodes.· The standard rose is really a bush rose growing on a single stem.
· Each time an affix is removed the remaining stem must be checked to determine whether it is a valid word.· Just rinse off the zucchini and dry it. Remove the hard stem end and the tip.· Cut the pepper in half lengthways and remove seeds and stem.· Peel peppers and remove stems, seeds and veins.· Remove the distance piece - the softer polystyrene block is easier to remove without damaging the stem than a harder wooden block.· However, removing the stem cells kills the embryo, and therefore has serious ethical implications.· Unearth them the following winter, remove all the rooted stems for transplanting and cut off any that have failed to root.· Sort and clean the seeds, removing stems, casings and chaff manually, by sieving or blowing away the debris.
1stem (1)the long thin part of a plant, from which leaves, flowers, or fruit grow SYN  stalk2the long thin part of a wine glass, vase etc, between the base and the wide top3the narrow tube of a pipe used to smoke tobacco4long-stemmed/short-stemmed etc having a long stem, a short stem etc:  long-stemmed wine glasses5the part of a word that stays the same when different endings are added to it, for example ‘driv-’ in ‘driving’
stem1 nounstem2 verb
stemstem2 verb (past tense and past participle stemmed, present participle stemming) [transitive] Word Origin
WORD ORIGINstem2
Origin:
1200-1300 Old Norse stemma. stem from 1900-2000 From STEM1
Verb Table
VERB TABLE
stem
Simple Form
PresentI, you, we, theystem
he, she, itstems
PastI, you, he, she, it, we, theystemmed
Present perfectI, you, we, theyhave stemmed
he, she, ithas stemmed
Past perfectI, you, he, she, it, we, theyhad stemmed
FutureI, you, he, she, it, we, theywill stem
Future perfectI, you, he, she, it, we, theywill have stemmed
Continuous Form
PresentIam stemming
he, she, itis stemming
you, we, theyare stemming
PastI, he, she, itwas stemming
you, we, theywere stemming
Present perfectI, you, we, theyhave been stemming
he, she, ithas been stemming
Past perfectI, you, he, she, it, we, theyhad been stemming
FutureI, you, he, she, it, we, theywill be stemming
Future perfectI, you, he, she, it, we, theywill have been stemming
Examples
EXAMPLES FROM OTHER DICTIONARIES
  • He used a rag to stem the bleeding.
EXAMPLES FROM THE CORPUS
  • The exact date of its original building is disputed but it probably stems from the late fifth or early sixth century.
  • The weakness of the Arab nations stems from the fact that they buy weapons instead of choosing to do their own research.
  • Their recovery since then stems from winning several lucrative long-term Defence contracts.
  • This small act of concealment had partly stemmed from the fact that she herself had never had money.
  • Thomas' patronage stems from the many churches he built during his pilgrimages.
  • Two things stem directly from the location of a submarine eruption.
  • Working through this despair, which stemmed from early childhood, was a long and painful task.
Thesaurus
Longman Language Activatorwhen one thing happens because of another
if something happens because of an earlier problem, event etc, it happens as a result of it: · Sampras seemed likely to miss the US Open because of a back injury.· Because of problems with the fuel system, the launch has been put back a week.· She was chosen for the Peace Prize because of her courageous fight for democracy.
to happen because of something else that happened or was done: · Our success is the result of a great deal of hard work.· The big population increase in the US was partly the result of immigration.· It is thought that the train crash resulted from a fault on the line.
to be the result of actions, experiences or good or bad conditions: · The agreement was the product of 21 months of negotiations.· Saturday's goal was the product of some poor defending by the opposing team.
if something comes of a situation or activity, it happens because of it: · The company is interested in the merger: many positive things could come of it.nothing came/has come etc of something (=nothing happened because of something): · I've applied for that job, but so far nothing's come of it.no good comes etc of something (=something does not have a good result): · My mother always said that no good would come of the relationship.
if something, especially a problem, stems from something else, it develops because of it and is directly connected with it: stem from from (doing) something: · Many of my patients' anxieties stem from experiences in their childhood.· The dog's aggression stemmed from being kept locked up all day.stem from the fact that: · Part of the education problem stems from the fact that class sizes have increased dramatically in the last 5 years.
if something such as a problem or difficult situation arises from something, it starts to exist because of it: · The argument arose from a misunderstanding.· Lung cancer is just one of the many diseases that arise from smoking too many cigarettes.arise from the fact that: · The difficulty arises from the fact that there has been insufficient time to train new staff.
to happen or exist as a helpful or useful result of someone's actions, decisions or discussions: · We're waiting to see what comes out of the inquiry before we make a decision.· Much of what came out of the Rio Summit did not have an immediate effect.
happening because of something else: · He died as a result of cold and exhaustion.· Over 60 drugs have been removed from sale as a result of recent tests.
happening or existing because of something else that happened before: · Burrows took the resulting penalty kick.· Without government support the factory would be forced to close, with the consequent loss of thousands of jobs.· Britain's resulting debt burden was greater than that of the French.
Collocations
COLLOCATIONS FROM THE ENTRY
 The measures are meant to stem the tide of illegal immigration.
 an attempt to stem the decline in profits
COLLOCATIONS FROM OTHER ENTRIES
(=one that divides and repairs the body, and may be used in medical treatment)· Stem cells may make life-saving treatment possible.
 I tied a towel round his leg to try to stem the flow of blood.
 an attempt to stem the flow of refugees across the border
COLLOCATIONS FROM THE CORPUSADVERB
· But its theatrical power also stems from its vivid evocation of time and place.· My next point also stems from this underlying tendency of the reforms to produce fragmentation and deregulation.· The Griffiths inquiry stemmed also from broader concerns in the provision of welfare in the late twentieth century.
· Two things stem directly from the location of a submarine eruption.· We have seen that the principal intellectual characteristics of adolescence stem directly or indirectly from the development of formal structures.· However, it is important to realise that these problems do not stem directly from the new Higher Still arrangements.· Rural social geographers take this view very seriously, as it stems directly from the political economy background outlined in chapter 1.· Some of the changes stemmed directly from the wartime period, others from the greater material prosperity of the 1920s.
· This stems largely from a failure to embrace new work practices and is no part of the new deal.· This lack of sensitivity to the wellsprings of quality largely stems from shopworn but doggedly persistent ideas on where to economize.· This stemmed largely from a lack of political analysis and clarity in relation to nationalism and feminism on the part of Southern feminists.· The changes stemmed largely from the generation gap.
· Ironically, the threat to rural post offices stems mainly from the Government's decision to automate pension and benefit payments.· These changes stem mainly from three Acts of Parliament.· I suggest that both the strength and the weakness of Moore's positive ethical views stem mainly from his method of isolation.
· This small act of concealment had partly stemmed from the fact that she herself had never had money.· The worries stem partly from a lack of confidence that their children will prosper unless provided with the best of opportunities.· Its difficulties have partly stemmed from cuts in Medicaid, but also from political interference.· That distinction is recent, stemming partly from Mahfouz's determination to make language match his theme.· His initial reluctance stemmed partly from a statement he had made in November 1991 vowing never to accept the post.· This stems partly from local resistance to change, and partly from the postwar approach to agricultural policy.· It stems partly from a failure to understand fundamentalism as a modern political force right across the world.
NOUN
· Across a range of industries, major innovations are implemented in attempts to stem the decline in profits.· But the networks have scrambled to keep them on the air for another year in an attempt to stem audience erosion.· Opec is to increase production by 1.45m barrels a day in an attempt to stem rising prices.· By the closing rounds he was reduced to throwing wild haymakers in a desperate attempt to stem the tide.
· Reid was being held without bail on five counts of rape and several other charges stemming from the string of attacks.· All the charges stem from Conoline's refusal to cooperate with an investigation into a botched Dec. 7 drug bust.· Prosecutors said an additional broker, Christopher Avena of Harriman Group, already has pleaded guilty to charges stemming from the investigation.· He faces charges stemming from accusations made by several trainees.
· Across a range of industries, major innovations are implemented in attempts to stem the decline in profits.· The company this year announced a reorganization aimed at stemming the profit decline.· What is the best way of stemming this decline or, even better, of regenerating the economy?· In order to stem the decline, it was suggested that the trade must change its image and recruit younger drinkers.· The government requested international assistance to support the balance of payments and to stem the decline in international reserves.
· It has since closed 100 stores in an effort to stem losses.
· This small act of concealment had partly stemmed from the fact that she herself had never had money.· This stems from the fact that the introduction of international trade combines both countries into an integrated economy.· Where the confusion seems to stem from is the fact that guitar music sounds an octave lower than concert pitch.· The weakness of the Arab nations stems from the fact that they buy weapons instead of choosing to do their own research.· Lipid asymmetries may stem from the fact that biological membranes need to have asymmetric protein distributions across the bilayer.· Their unease about Microsoft's offer stems from the fact that a behavioural remedy is difficult to police.
· This stems largely from a failure to embrace new work practices and is no part of the new deal.· It stems partly from a failure to understand fundamentalism as a modern political force right across the world.
· The General Manager is inside it, in a wetsuit, trying to stem the flood.· Church had effectively stemmed the flood of artists.· Then she dropped her face into her hands, unable to stem the flood of tears a second longer.
· Sandbags were used to stem the flow but several corridors were soon under water.· To stem the flow, he advocates strict trade protections, including high tariffs on imported goods.· When was she going to stem the financial flow?· The brigadier tried to stem the flow with a tourniquet.· How can we stem the tidal flow of change?· She stemmed the flow of tears that came, knowing they would sting his body.· Rose stemmed the flow, encouraged the ebb, and he allowed it to be that way.· After the game Kasparov said that Karpov had to play 24 ... d3 to stem the flow of the White attack.
· Through this conservative normativist theory Dicey attempted to stem the tide of government growth in a collectivist direction.· The growth in such services will often stem from government legislation providing for higher standards as the following examples make clear.
· These controversies stem from disagreements over growth and what kinds of jobs Marana should be attracting, observers say.· But it failed to stem the growth of Modern Orthodoxy.
· But nothing was to stem the loss of traffic to the road.· He and the Chairman, Clive Labovitch, were able to stem the losses.· The measure would have made it more difficult to sue companies for fraud stemming from stock losses.· Efficient emergency treatment relies upon being able to stem the blood loss with a tourniquet around the foot.· It has since closed 100 stores in an effort to stem losses.
· In part this difficulty may stem from the uncertain legal nature of the action for breach of confidence.· In part, this stems from the creation of tech-prep programs during the early 1990s.· In part, this stems from history.
· But its theatrical power also stems from its vivid evocation of time and place.· Reputation is a base of power stemming from others who have a favorable opinion of your work and capabilities.
· It also tries to say that women's problems stem from either their sexuality or the family.· Part of the problem stems from real or imagined slights between their respective aides, Glenn Miller and Chris Limberis.· Other problems stem from the ambiguities of language and the complex rules of pleading.· Part of this problem stems from all the propaganda they bombard you with when you buy a four-wheel-drive vehicle.· However, problems stemming from its lack of use in the preceding year became apparent later.· He notes that employers identify problems stemming from inappropriate work attitudes or behaviors as the primary cause of poor job performance.· Gerstner's biggest problem may stem from the sources of his success.· All his problems stem from tension.
· From this stemmed the rise in illegitimacy.
· Part of Malthus' s pessimism stemmed from the conviction that when population increased the price of labor would drop.
· Through this conservative normativist theory Dicey attempted to stem the tide of government growth in a collectivist direction.· Even the great Chicago fire of 1871 could not stem the tide.· Barnes managed to stem the tide a little by giving Liverpool a genuine attacking outlet.· This illustrates the type of practical public health action that could be taken to stem the tide of obesity.· By the closing rounds he was reduced to throwing wild haymakers in a desperate attempt to stem the tide.· Only one way to stem the tide for Ireland: take out Figo.· Both the Senate and the administration seemed powerless to stem the tide of hysteria.· But even visions of breastfeeding could not stem the tide this time.
VERB
· New chairman Robert Corbett says most of the losses seem to stem from incompetent grain trading.· But the implied unity of mankind seems to stem from indifference.· Where the confusion seems to stem from is the fact that guitar music sounds an octave lower than concert pitch.· No satisfactory explanation of this decline has been adduced, but it seems likely to have stemmed from changes in agricultural practice.· Both the Senate and the administration seemed powerless to stem the tide of hysteria.
· The General Manager is inside it, in a wetsuit, trying to stem the flood.· Busy on two phones at once trying to stem disaster, you had no time to turn and look.· Nell clutched at her chest, trying to stem the rising swell of nausea.· She had simply eaten one after another to try and stem the feelings of anxiety within her.· Six passers-by tried to stem the blood with their fingers and thumbs.
1to stop something from happening, spreading, or developingstem the tide/flow/flood of something The measures are meant to stem the tide of illegal immigration.stem the growth/rise/decline etc an attempt to stem the decline in profits2formal to stop the flow of a liquid:  A tight bandage should stem the bleeding.stem from something phrasal verb to develop as a result of something else:  His headaches stemmed from vision problems.
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