an action performed or a feeling experienced in response to a situation or event
反应
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Carrie's immediate reaction was one of relief .嘉丽的第一反应是感到宽慰。
(
(人对外部刺激的)反应力
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a skilled driver with quick reactions .反应极快的熟练驾驶员。
an adverse physiological response to a substance that has been breathed in, ingested, or touched
(对吸入、咽下或触及的东西的)不良生理反应
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such allergic reactions as hay fever and asthma .干草热和哮喘等过敏反应。
a chemical process in which two or more substances act mutually on each other and are changed into different substances, or one substance changes into two or more other substances
化学反应。
【物理】 反应。
a mode of thinking or behaving that is deliberately different from previous modes of thought and behaviour
反抗;对抗
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the work of these painters was a reaction against fauvism .这些画家的作品是对野兽派的对抗。
[mass noun]opposition to political or social progress or reform
反动,极端保守主义
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the institution is under threat from the forces of reaction. 这一机构受到反动势力的威胁。
[mass noun]
【物理】 反作用(力),反力,阻力。
"mid 17th cent.: from