1 VERB （作出）反应；回应 When you react to something that has happened to you, you behave in a particular way because of it. （作出）反应；回应 [Also VERB]
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They reacted violently to the news. [VERB + to]
他们对这条新闻反应强烈。
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It's natural to react with disbelief if your child is accused of bullying. [VERB adv./prep.]
如果你的孩子被指责欺负了别的孩子，你不相信是很正常的。
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'How did he react?' — 'Very calmly.' [VERB adv./prep.]
“他有什么反应？”—“非常平静。”
SYN respond, act, take, proceed
2 VERB 反抗;不服;反对 If you react against someone's way of behaving, you deliberately behave in a different way because you do not like the way they behave. 反抗;不服;反对
SYN rebel against, oppose, revolt against, rise up against
3 VERB 产生不良反应;过敏 If you react to a substance such as a drug, or to something you have touched, you are affected unpleasantly or made ill by it. 产生不良反应;过敏 [Also VERB]
SYN respond
4 V-RECIP 起（化学）变化;发生（化学）反应 When one chemical substance reacts with another, or when two chemical substances react, they combine chemically to form another substance. 起（化学）变化;发生（化学）反应
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Calcium reacts with water. [VERB + with]
钙和水会发生化学反应
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Under normal circumstances, these two gases react readily to produce carbon dioxide and water. [VERB]
在正常情况下，这两种气体容易发生反应产生二氧化碳和水。
| Word Partnership | Use react with: |
| ADJ. | slow to react 1 |
| N. | react to news, react to a situation 1 |
| ADV. | react differently, react emotionally, how to react, react negatively, react positively, react quickly 1 react strongly, react violently 1 3 4 |
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