英语词汇“emit”的英英意思、用法、释义、翻译、读音、例句、短语、词组-英语词典

WORD ORIGINemit

Origin:

1600-1700 Latin emittere, from mittere ‘to send’

VERB TABLE

emit

Simple Form
Present	I, you, we, they	emit
	he, she, it	emits
Past	I, you, he, she, it, we, they	emitted
Present perfect	I, you, we, they	have emitted
	he, she, it	has emitted
Past perfect	I, you, he, she, it, we, they	had emitted
Future	I, you, he, she, it, we, they	will emit
Future perfect	I, you, he, she, it, we, they	will have emitted

Continuous Form
Present	I	am emitting
	he, she, it	is emitting
	you, we, they	are emitting
Past	I, he, she, it	was emitting
	you, we, they	were emitting
Present perfect	I, you, we, they	have been emitting
	he, she, it	has been emitting
Past perfect	I, you, he, she, it, we, they	had been emitting
Future	I, you, he, she, it, we, they	will be emitting
Future perfect	I, you, he, she, it, we, they	will have been emitting

EXAMPLES FROM OTHER DICTIONARIES

Sounds emitted by the dolphins were recorded with an underwater microphone.
The Earth emits natural radiation.
The machine emits regular bleeps which indicate the heart rate.
When minerals such as quartz are heated, they emit light.

EXAMPLES FROM THE CORPUS

An average car emits five lungfuls of poisonous carbon monoxide gas per mile.
But soon after lunar sunrise, it emitted an extremely powerful blast of radio energy.
He knew he had acquired an object which emitted other noxious gases - Pitfall Number One - but that wasn't all.
It emitted less than a tenth as much radiation.
Sleep becomes very deep as your brain emits high, wide delta waves.
The ratios change over time as potassium undergoes radioactive decay and emits argon gas.

Longman Language Activatorwhen something sends out signals, light, heat etc► send out

· The beacon sends out a beam of light every thirty seconds.· He lit a fire, which sent out clouds of dense smoke.· The radar sends out radio waves and listens for echoes from enemy craft.

► give out

to send out light, sound, heat etc: · The oil lamp gave out a pleasant yellowish light.· The musical triangle gives out a clear, beautiful note when struck.· The stun gun, when applied to the body, gives out a sharp electric shock.

► give off

to send out heat, smells, gas etc as a result of a natural or chemical process: · The plant gives off a delicate smell of lemons.· Gas heaters should only be used in well-ventilated rooms as they give off carbon monoxide.

► emit

formal to send out heat, light, smells, gas etc: · When minerals such as quartz are heated, they emit light.· The Earth emits natural radiation.

► radiate

especially written to send out light or heat in all directions from a central point: · The sun radiates both warmth and light.· The old and faded lights radiated a feeble glow upon the walls.

► cast/throw

to send out light onto a surface or onto a particular area - used especially in stories and descriptions: · The sun shining through the trees cast a pattern of light and shade on the footpath.· Candles in tarnished holders threw a warm light over the room.

to make a sound► make a sound/make a noise

· I knew that if I made any sound, they would find me.· The engine made a very strange noise when I tried to start the car.make a buzzing/creaking/tapping etc sound · Every time someone opens that door, it makes a terrible creaking sound.make a sound/make a noise like · The lamb was making a sound like a baby crying.

► go

: go bang/beep/pop etc especially spoken to make a short loud sound: · I was using the hairdryer and suddenly it went bang and stopped working.· The microwave should go ping when it's finished.

► with

: with a bang/crash/thud etc making a loud sound: · The picture fell to the floor with a loud crash.· Rockets flew into the air and then exploded with a terrific bang.

► go off

if something goes off , it starts making a noise - use this about warning bells, clocks that tell you it is time to get up etc: · My neighbour's car alarm went off three times last night.· I get up as soon as the alarm clock goes off at 7:15.

► emit

to make a particular kind of sound - use this especially in scientific and technical contexts: · The machine emits regular bleeps which indicate the heart rate.· Sounds emitted by the dolphins were recorded with an underwater microphone.

► let out

if someone lets out a particular kind of sound, they make it, especially when something surprises, frightens, or hurts them: · "It can't be true," Maria said, letting out a sob.· A hand touched her shoulder. She let out a scream.

COLLOCATIONS FROM OTHER ENTRIES► emit a signal

(=sends one out)· The device emits a signal which can be picked up by a submarine.

COLLOCATIONS FROM THE CORPUSNOUN► light

· When minerals such as quartz and feldspars have received a radiation dose and are then heated, they emit light.· Are black smokers hot enough to emit light visible to the shrimp?· Scientists can learn much about the nature of an object by studying the way it emits and absorbs light and other radiation.· Suppose he were to emit a flash of light from a torch.· The right-angle configuration does not prevent loss of the exciting or the emitted light. 19.

► particle

· What happens is that a matter particle, such as an electron or a quark, emits a force-carrying particle.· As the emitted particles are absorbed by the surrounding matter, their energy of motion is transformed into heat.

► radiation

· All matter at temperatures above that of absolute zero emits infrared radiation.· Energy lost by electrons as they are evicted from their traps is emitted as light radiation and is termed thermoluminescence.· But a body with a particular temperature must emit radiation at a certain rate.· The lamps emit ultra-violet radiation which has powerful cancer-causing abilities, according to a small pilot study on its effects on mice.· The isotopes are measured by counting their alpha emissions; each isotope emits alpha radiation of a characteristic frequency.

► signal

· This was suspected because when the particles collide they emit radio signals.· Each transmitter in each fish emits a different signal, explained Vlach.· A transponder is a device that emits radar signals identifying and locating aircraft for air traffic controllers.

► sound

· The Clown Loach are continually fighting; they emit a clicking sound which I know is territorial.· One emits a low sound. the other a sound of higher pitch.· These emit two distinct sounds, depending on which end one blows into.· Instantly, the metal container began to emit a clicking sound.· She came even closer and emitted a sound like laughter.· This encouraged the natural impulse to whistle, and led in turn to the use of instrumental whistles emitting high-frequency sound.