reaction
/riˈækʃn/
n.
一句话记住
反应；回应；化学反应
释义与例句
n.
反应；回应
something that you feel, say, or do because of something that has happened
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Her first reaction was to refuse the offer.
她的第一反应是拒绝这个提议。
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The announcement produced an angry reaction from the crowd.
这项公告引起了人群的愤怒反应。
展开其余 1 条例句
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His reaction to the news surprised everyone.
他对这个消息的反应让所有人感到意外。
n.
化学反应
a chemical change caused by two or more substances acting on each other
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The reaction between the two chemicals produces heat.
这两种化学品之间的反应会释放热量。
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A catalyst can speed up a chemical reaction.
催化剂可以加快化学反应。
展开其余 1 条例句
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The students observed the reaction in a glass tube.
学生们在玻璃管中观察了这一反应。
词源与构词
记忆钩子
react 是动词，reaction 是名词；两者表示“对……反应”都接 to。
词族与关联词
同根词（同一个词根长出来的词）
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act 行为；行动Helping the lost child was a simple act of kindness. 帮助那个迷路的孩子是一个简单的善举。
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action 行动；措施The government promised action to reduce air pollution. 政府承诺采取行动减少空气污染。
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active 积极的；活跃的；起作用的Regular exercise helps older people stay active. 经常锻炼有助于老年人保持活力。
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activity 活动；活跃状态The centre offers outdoor activities for children of all ages. 该中心为各年龄段儿童提供户外活动。
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actor 演员The actor spent months learning the accent for his role. 这位演员为了角色花了数月学习那种口音。
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actress 女演员The actress prepared for the role by interviewing real nurses. 这位女演员通过采访真正的护士来为角色做准备。
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actual 实际的；真实的The actual cost of the repairs was much higher than the estimate. 实际维修费用比估价高得多。
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actually 实际上；其实；竟然The task looks difficult, but it is actually quite simple. 这项任务看起来很难，但其实相当简单。
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exact 精确的；确切的；完全相同的The exact cause of the failure has not yet been established. 故障的确切原因尚未确定。
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interact 互动；交流；相互作用Students interact with each other through online discussions. 学生通过在线讨论相互交流。
词族（同一词根派生出的不同词性或形式）
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react 反应；回应react 是动词，常用 react to something；reaction 是名词，常用 reaction to something。How did she react when you told her the truth? 你告诉她真相时，她有什么反应？
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reactive 反应迅速的；易起化学反应的reactive 作形容词，可指对事件作出反应，也可指物质化学性质活泼。Sodium is a highly reactive metal. 钠是一种化学反应性很强的金属。
同义词
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response 回应；答复reaction 常指即时、自然或情绪化的反应；response 可指较有意识的回答、行动或正式回应。The company has received a positive response to its proposal. 公司的提议得到了积极回应。
易混词（形近或义近，注意区别）
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action 行动；行为action 是主动采取的行动；reaction 是针对某事而产生的回应或变化。Immediate action is needed to prevent further damage. 需要立即采取行动，以防止进一步损害。
常见搭配
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reaction to 对……的反应Public reaction to the new law was mixed. 公众对这项新法律的反应不一。
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chemical reaction 化学反应The experiment demonstrates a simple chemical reaction. 这个实验展示了一种简单的化学反应。