emit
/iˈmɪt/
v.
一句话记住
发出(光、热、声音、气味);排放(气体、辐射、污染物)
释义与例句
v.
发出(光、热、声音、气味)
to send out light, heat, sound or smell
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The lamp emits a soft yellow light.
这盏灯发出柔和的黄光。
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The machine emits a low humming sound all night.
这台机器整夜发出低沉的嗡嗡声。
展开其余 3 条例句
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These flowers emit a strong scent at night.
这些花在夜间散发出浓烈的香味。
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The sun emits heat and light that make life on Earth possible.
太阳发出光和热,使地球上的生命成为可能。
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The old radio emitted a strange noise whenever it rained.
每逢下雨,这台旧收音机就发出奇怪的噪声。
v.
排放(气体、辐射、污染物)
to release gas, radiation or pollutants into the environment
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Cars emit large amounts of carbon dioxide.
汽车排放大量二氧化碳。
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The factory was fined for emitting harmful gases into the valley.
这家工厂因向山谷排放有害气体被罚款。
展开其余 3 条例句
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Older buses emit far more pollution than new ones.
旧公交车比新车排放的污染物多得多。
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The reactor emits a small amount of radiation during normal operation.
反应堆在正常运行时会释放少量辐射。
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Countries have agreed to cut the greenhouse gases they emit.
各国已同意减少温室气体排放。
词源与构词
e-(向外)+ mittere(送),把光、热、声、气送到外面,就是“发出、排放”。
e-
前缀 · out,向外
mit
词根 · to send,送;放
记忆钩子
e(向外)+ mit(送):把光和热送到外面,就是发出;把废气送出去,就是排放。
词族与关联词
同根词(同一个词根长出来的词)
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admit 承认;供认He admitted that he had made a mistake. 他承认自己犯了一个错误。
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commission 委员会;专门委员会The government appointed a commission to investigate the accident. 政府任命了一个委员会来调查这起事故。
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commit 犯(罪、错)He committed a serious crime and was sent to prison for ten years. 他犯下重罪,被判入狱十年。
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dismiss 解雇;遣散The manager dismissed two workers. 经理解雇了两名工人。
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mission 任务;差事The team was sent on a rescue mission to the mountains. 这支队伍被派往山区执行救援任务。
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omit 省略;删去You can omit the last paragraph to save space. 为节省篇幅,你可以删去最后一段。
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permit 允许;准许Smoking is not permitted here. 这里不准吸烟。
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remit 汇(款);汇寄He remits part of his salary to his parents every month. 他每月把部分工资汇给父母。
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submit 提交;呈递Please submit your essay by Friday. 请在周五前提交你的论文。
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transmit 传送;播送The station transmits signals across the city. 这家电台向全城播送信号。
词族(同一词根派生出的不同词性或形式)
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emission 排放;散发;排放物emit 变 -ssion,动词变名词
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emitter 发射体;发射器emit + -er,表示发出某物的装置
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emitting 发光的;排放的emit + -ing,现在分词作定语,如 emitting devices
同义词
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discharge 排放;排出discharge 多指液体、气体从管道或容器中排出;emit 更泛,还指发出光、声、气味。The pipe discharges waste into the sea. 这条管道把废物排入大海。
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release 释放;排放release 强调从束缚中放出,可指释放人或发布消息;emit 只指自然或机械地发出光热声气。The factory released chemicals into the river. 这家工厂向河里排放了化学品。
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give off 散发(气味、热量)give off 是口语短语,多指散发出气味、热量;emit 正式,常见于科技与环境文本。Fresh bread gives off a warm smell. 新烤的面包散发出温热的气息。
反义词
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absorb 吸收Plants absorb carbon dioxide from the air. 植物从空气中吸收二氧化碳。
易混词(形近或义近,注意区别)
常见搭配
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emit light 发光Some deep-sea fish emit light to attract prey. 一些深海鱼会发光来吸引猎物。
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emit carbon dioxide 排放二氧化碳Coal plants emit carbon dioxide around the clock. 燃煤电厂昼夜不停地排放二氧化碳。
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emit radiation 释放辐射The damaged device continued to emit radiation. 受损的装置仍在释放辐射。