| 单词 | concentration |
| 释义 | concentration (kɒnsəntreɪʃən ) Word forms: concentrations 1. uncountable noun B2 Concentration on something involves giving all your attention to it. Neal kept interrupting, breaking my concentration. We lacked concentration and it cost us the goal and the game. 2. variable noun A concentration of something is a large amount of it or large numbers of it in a small area. The area has one of the world's greatest concentrations of wildlife. [+ of] There's been too much concentration of power in the hands of central authorities. [+ of] Synonyms: convergence, collection, mass, cluster 3. variable noun [noun NOUN] The concentration of a substance is the proportion of essential ingredients or substances in it. pH is a measure of the concentration of free hydrogen atoms in a solution. [+ of] Global ozone concentrations have dropped over the last decade. Collocations: concentration level To take a photograph, a wearer's concentration level must pass a threshold. Times, Sunday Times However, by 2:30 p.m. the concentration level finally dropped below 10 ppm. Retrieved from Wikipedia CC BY-SA 3.0 Auxin concentration level, together with other local factors, contributes to cell differentiation and specification of the cell fate. Retrieved from Wikipedia CC BY-SA 3.0 Other contributing factors included concentration level, fatigue, sleep habits, fever, emotions, and substances, such as caffeine or alcohol. Retrieved from Wikipedia CC BY-SA 3.0 The gas concentration level reading peaked at 5,000 ppm at around 11 a.m which was mostly methane. Retrieved from Wikipedia CC BY-SA 3.0 They are one of the healthiest bits of a loaf - packed with a higher concentration of nutrients plus good bacteria for your gut. The Sun To calibrate the nutritional aspects of the model, data describing the concentration of nutrients in the various biomass components are required. Retrieved from Wikipedia CC BY-SA 3.0 More blood flow would also result in a higher concentration of nutrients. Retrieved from Wikipedia CC BY-SA 3.0 A concentration of population 'greatly accelerates the attainment of prosperity, and enlarges the fund which may be drawn upon for further emigration'. The Times Literary Supplement The central plateau constitutes only 25 percent of the land area but contains the heaviest concentration of population and the country's largest cities. Retrieved from Wikipedia CC BY-SA 3.0 The concentration of population must have a name, be locally recognized, and not be part of any other place. Retrieved from Wikipedia CC BY-SA 3.0 Perhaps the great geographical concentration of population and the corresponding short distances between urban centres was crucial. Retrieved from Wikipedia CC BY-SA 3.0 With the concentration of population came more interest in education and culture. Retrieved from Wikipedia CC BY-SA 3.0 Critics have argued that this concentration of power has contributed to a string of accounting scandals and corporate failures in recent years. Times,Sunday Times First and foremost, it's an undue concentration of power. Times, Sunday Times This concentration of power has required willpower and charisma. Times, Sunday Times Those who could write, who could count, who could print, who could read, enjoyed a concentration of power that technology diluted. Times, Sunday Times He was thought to have grown frustrated at the concentration of power at the top of the group. Times, Sunday Times This summer has been characterised by large social protests across the country during which demonstrators have expressed fury at the concentration of wealth. Times, Sunday Times Instead, it has triggered sudden concentration of wealth and power among the tech giants. Times, Sunday Times This in itself was striking, suggesting an unusual concentration of wealth and power. Times,Sunday Times Before the recession, it was relatively easy to ignore this concentration of wealth among an elite few. Times, Sunday Times Seldom has there been such an outpouring of opinion on the concentration of wealth. Times, Sunday Times The concentration rises for the first few miles before declining to under 10 milligrams per liter in the lower reaches of the creek. Retrieved from Wikipedia CC BY-SA 3.0 Like other greenhouse gases, methane contributes to global warming when its atmospheric concentration rises. Retrieved from Wikipedia CC BY-SA 3.0 The exchanger comes into service when the calcium concentration rises steeply or spikes and enables rapid recovery. Retrieved from Wikipedia CC BY-SA 3.0 During exercise the epinephrine blood concentration rises partially from increased secretion from the adrenal medulla and partly from decreased metabolism because of reduced hepatic blood flow. Retrieved from Wikipedia CC BY-SA 3.0 These are dark brown because of the dense concentration of symbiotic algae known as zooxanthellae that they contain. Retrieved from Wikipedia CC BY-SA 3.0 Its concave lower surface houses a dense concentration of larger nectar glands, which are otherwise absent from the lid. Retrieved from Wikipedia CC BY-SA 3.0 Four conditions were necessary to enable the diversity essential for urban renewal: mixed uses, small walkable blocks, mingling of building ages and types, and a sufficiently dense concentration of people. Retrieved from Wikipedia CC BY-SA 3.0 Many in the industry allege that this dense concentration of talent, entrepreneurship and supply stores functions like an ecosystem in which each of the parts help sustain the whole. Retrieved from Wikipedia CC BY-SA 3.0 It may be found in dense concentrations or singly. Retrieved from Wikipedia CC BY-SA 3.0 Elevated concentration of methiocarb may be the result from post-mortem uptake, but it could also be the post-mortem redistribution of methiocarb and metabolites from the gastrointestinal tract. Retrieved from Wikipedia CC BY-SA 3.0 Persistently elevated concentrations of adenosine beyond the acute-injury phase leads to fibrotic remodelling. Retrieved from Wikipedia CC BY-SA 3.0 Soybeans grown in sewage sludge likely contain elevated concentrations of metals. Retrieved from Wikipedia CC BY-SA 3.0 Elevated concentrations can be found in air, water, soil, food, sediment, sludge, and dust. Retrieved from Wikipedia CC BY-SA 3.0 Researchers suggest that even short-term exposure at elevated concentrations could significantly contribute to heart disease. Retrieved from Wikipedia CC BY-SA 3.0 This may be an excessive concentration in a plan specifically meant to be for retirement security. Retrieved from Wikipedia CC BY-SA 3.0 Excessive concentration of uric acid in the blood stream leads to gout. Retrieved from Wikipedia CC BY-SA 3.0 It had also developed an elaborate set of checks and balances to prevent the excessive concentration of power. Retrieved from Wikipedia CC BY-SA 3.0 The reason for the dual administrative structure was to prevent excessive concentration of power in the hands of the governor, as well as to limit his opportunities for peculation. Retrieved from Wikipedia CC BY-SA 3.0 Some substances such as nitric oxide and glutamate are in fact essential for proper function of the body and only exert neurotoxic effects at excessive concentrations. Retrieved from Wikipedia CC BY-SA 3.0 There's little chatter, few smiles, just fierce concentration. Times, Sunday Times I have rarely seen such fierce concentration expended in such quiet contemplation, nor a keener recognition that greatness requires constant growth. Times, Sunday Times Look for that fierce concentration. Times, Sunday Times I found myself locked in a beam of fierce concentration. Times, Sunday Times Each parcel has gas concentration, pressure, temperature, and humidity. Retrieved from Wikipedia CC BY-SA 3.0 Manufactures can customize electrochemical gas detectors by changing the porous barrier to allow for the detection of a certain gas concentration range. Retrieved from Wikipedia CC BY-SA 3.0 The gas concentration level reading peaked at 5,000 ppm at around 11 a.m which was mostly methane. Retrieved from Wikipedia CC BY-SA 3.0 Usually, the gas moves from areas of high concentration to areas of low gas concentration around a landfill. Retrieved from Wikipedia CC BY-SA 3.0 He formulated a simple mathematical relationship between the gas concentration and the necessary exposure time. Retrieved from Wikipedia CC BY-SA 3.0 For example, a sharp fall in dividend payouts could have been caused by the fund manager holding a heavy concentration of bank stocks. Times, Sunday Times In addition to a heavy concentration on certain stocks, income funds also run the risk of being unduly focused on certain sectors, such as oil and gas and telecoms. Times, Sunday Times The purpose of independent artillery units was presumably to permit heavy concentration of firepower, especially useful for sieges. Retrieved from Wikipedia CC BY-SA 3.0 In addition to a heavy concentration of tourism-oriented shops and eateries, there are many bars and nightclubs in the area. Retrieved from Wikipedia CC BY-SA 3.0 A heavy concentration of enemy artillery fire scored hits on his strong point. Retrieved from Wikipedia CC BY-SA 3.0 It contains the highest concentration of encapsulated retinol available over the counter. Times, Sunday Times (2008) One dead bird had a high concentration of ethanol in its liver. The Sun (2012) The high concentration of toxic gases underground is hampering the rescue attempt. Times, Sunday Times (2016) With the high concentration of businesses has come intense competition. Times, Sunday Times (2014) The highest concentration of cheralite was found in monazite from the alkali-feldspar syenites (up to 69.3 mol %). 2018, 'REE and Y Mineralogy of the Krudum Granite Body (Saxothuringian Zone)', Minerals Most respondents said that they indulged to 'improve concentration' and most did so on a daily or weekly basis. Times, Sunday Times Research shows that good hydration can help to improve concentration and mood at school. Times, Sunday Times Police officers could be allowed to sleep on duty to improve concentration and combat the effects of fatigue and stress. Times, Sunday Times According to the research, they improve concentration, satisfaction and productivity as well as lowering stress - and it's such a simple change to make. The Sun Caffeine in these drinks stimulates our nervous system and has been shown in clinical research to improve concentration. The Sun Only sucralose intake increased the concentration of hepatic cholesterol and cholic acid. 2017, 'Effects of Low-Dose Non-Caloric Sweetener Consumption on Gut Microbiota in Mice', Nutrients Further, the experimental results showed that increasing the concentration of bromide ions enhances the formation of dibromochloromethane and bromoform. 2015, 'Effect of water quality and operational parameters on trihalomethanes formation potential in Dez River water, Iran', Water Resources and Industry Diamagnetic to ferromagnetic change was observed with increased concentration of nickel. 2018, 'Structural, morphological, magnetic and electrical properties of Ni doped ZnO nanoparticles synthesized by co-precipitation method', Processing and Application of Ceramics The total number of flowers per inflorescence was reduced as ethephon concentration was increased. 2016, 'Branching, flowering and fruiting of Jatropha curcas treated with ethephon or benzyladenine and gibberellins', Anais da Academia Brasileira de Ciências Symptomatic therapies aim at increasing the concentration of acetylcholine at the muscle endplate. 2011, 'Update on treatment options for Lambert–Eaton myasthenic syndrome: focus on use of amifampridine', Neuropsychiatric Disease and Treatment Eve brings his usual intense concentration to the part. Times, Sunday Times Real driving also requires intense concentration and unexpected physical exertion as the car goes around the bends and over the bumpy surface. Times, Sunday Times The passes were knocked askew, a yard behind the target, or hit too hard or too high and then controlled with looks of intense concentration. Times, Sunday Times Workers say their task requires intense concentration which leaves them with sore eyes and aching limbs and backs. The Sun Like the bee, building software requires intense concentration and precision, but the accomplishments belong to the team. Retrieved from Wikipedia CC BY-SA 3.0 A lack of concentration cost us two goals. The Sun Indecision, or lack of concentration, leads to one thing: staring at each other, in pain, on the landing side. Times, Sunday Times We are conceding late goals because of a lack of concentration. The Sun There are symptoms such as tiredness, memory problems and lack of concentration - but we get those as we age. The Sun Obsessions with phones can lead to car crashes and accidents through lack of sleep, lack of concentration and economic despair. The Sun But one lapse of concentration has cost us. The Sun (2014) We should have made it two or three but one lapse of concentration cost us. Times, Sunday Times (2016) We spent a lot of time working on set-pieces and one little lapse of concentration cost us. Times, Sunday Times (2008) The most likely reason was a momentary lapse of concentration. Times, Sunday Times (2014) Perhaps the collapse could have been attributed to a momentary lapse of concentration. Times, Sunday Times (2016) The large concentration of raisins proved poisonous. Times, Sunday Times Hence, the removal of a large concentration of alcohol from blood may follow zero-order kinetics. Retrieved from Wikipedia CC BY-SA 3.0 This causes a large concentration gradient of calcium across the cnidocyte plasma membrane. Retrieved from Wikipedia CC BY-SA 3.0 The large concentration of lectins in plant seeds decreases with growth, and suggests a role in plant germination and perhaps in the seed's survival itself. Retrieved from Wikipedia CC BY-SA 3.0 Covers an area of approximately 80 hectares, with a large concentration of petroglyphs. Retrieved from Wikipedia CC BY-SA 3.0 He was someone who had terribly low concentration. Times, Sunday Times Low concentration oils and pills bought at pharmacies without prescription. The Sun He unwittingly testified to both the volume of ale consumed and the low concentration span of a modern crowd - again, mirroring society. Times, Sunday Times On arrival, bananas are held at about and treated with a low concentration of ethylene. Retrieved from Wikipedia CC BY-SA 3.0 At low concentration, estrogen inhibits gonadotropins, but high concentration of estrogen stimulates them. Retrieved from Wikipedia CC BY-SA 3.0 On the other hand, you do wonder about their ability to maintain concentration and intensity for 80 minutes. Times, Sunday Times But we must maintain concentration because in a season it can happen that you have to overcome a difficult period. The Sun You try to maintain concentration but it's one thing to say it. Times, Sunday Times They recommend eating breakfast to restore energy levels after sleep and drinking water all day to maintain concentration. Times, Sunday Times Regular breaks also help to maintain concentration and stop drivers falling asleep at the wheel. Times, Sunday Times Mix immediately before application to ensure maximum concentration. The Sun His method, unorthodox as it was, required maximum concentration and effort. Times, Sunday Times These are the type of lapses that tend to happen when a team has begun to tire towards the end of a test that requires maximum concentration and physical effort. Times, Sunday Times As altitude increased, the concentration rapidly increased to the maximum concentration near the middle of the cloud. Retrieved from Wikipedia CC BY-SA 3.0 A few different organizations determined a maximum concentration sulfotep in the air. Retrieved from Wikipedia CC BY-SA 3.0 The halimeter works by measuring the concentration of sulphide gasses in parts per billion. Times, Sunday Times (2014) The maximal intrastromal riboflavin concentration was measured by high-performance liquid chromatography/ mass spectrometry (mcg/dg). 2015, 'Evaluation of Intrastromal Riboflavin Concentration in Human Corneas after Three Corneal Cross-Linking Imbibition Procedures: A Pilot Study', Journal of Ophthalmology The corneas were removed and the dye concentration was measured by a spectrophotometric micromethod. 2004, 'Avaliação espectrofotométrica do azul de Evans na reação inflamatória da córnea: estudo experimental em coelhos Spectrophotometric evaluation of Evans blue in inflammatory cornea reaction: experimental study in rabbits', Arquivos Brasileiros de Oftalmologia This measurement depends on the size of the particle core, the size of surface structures, particle concentration, and the type of ions in the medium. Retrieved from Wikipedia CC BY-SA 3.0 Measurements such as, pressure field, energy budgets, vertical particle concentration and accurate deposit heights are a few to mention. Retrieved from Wikipedia CC BY-SA 3.0 In the early 1980s it was found that it was advantageous to decrease the particle concentration down to levels where individual particles could be observed. Retrieved from Wikipedia CC BY-SA 3.0 The glass particles slowed or curtailed yeast growth as a function of increasing particle concentration. Retrieved from Wikipedia CC BY-SA 3.0 In-car particle concentrations are 27 times higher than in a smoker's home. Times, Sunday Times Other symptoms vary but may include muscle and joint pain, poor concentration, headaches and sensitivity to light. Times, Sunday Times Symptoms include memory loss, poor concentration, difficulty speaking and reading as well as changes in personality and sleeping patterns. The Sun Score 0 if you exhibit classic stress symptoms such as panic, irritability, poor concentration, memory loss and trouble sleeping. The Sun Often triggered by a viral infection, its symptoms include aching muscles and poor concentration, but mainly chronic fatigue. Times, Sunday Times On the more immediate side of life, a less than optimal diet can lead to poor concentration and behavioural problems and hamper learning potential. Times, Sunday Times He says the devices reduce the concentration of calcium and magnesium ions, which make water 'hard', and help save money. Times, Sunday Times Corticosteroids may also reduce the concentration of aspirin. Retrieved from Wikipedia CC BY-SA 3.0 Drying the mushrooms can also reduce the concentration of gyromitrin; ten days of open air desiccation leads to the loss of 90% of gyromitrin. Retrieved from Wikipedia CC BY-SA 3.0 Smoking, often used in the process of curing meat, adds chemicals to the surface of meat that reduce the concentration of salt required. Retrieved from Wikipedia CC BY-SA 3.0 There are a number of ways to reduce the concentration of inclusions. Retrieved from Wikipedia CC BY-SA 3.0 Increasing difficulties with tasks and activities that require concentration and planning ? The Sun One's a delicate activity that requires concentration if you''re not going to make a mess of your shirt. Times, Sunday Times With long-distance running the mind zones out, but swimming requires concentration. Times, Sunday Times The market's moving every second, so it requires concentration. Times, Sunday Times It was horribly difficult, at times uncoiling slow as a slow worm, requiring concentration and some kind of serious appreciation of cricket. Times, Sunday Times Put your phone away and make the tea now - this complex political thriller requires total concentration. The Sun I am working for a club who deserve my total concentration. The Sun These are 0.1 micrograms per litre for each pesticide and 0.5 micrograms per litre for the total concentration. Times, Sunday Times But there's little opportunity to admire the scenery because this switchback road, the crumbling equivalent of a ledge around a skyscraper, demands total concentration. Times, Sunday Times This was an evening of uncompromising art music, worthy of the total concentration of the audience — and funded by butter advertisements. Times, Sunday Times Translations: Chinese: 集合 Japanese: 集中 |
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