react to something 对某事做出反应
react against something 反抗
chemically react 化学反应
A: How did he react to your suggestion?
A：他对你的建议是什么反应？
B: He reacts very positively to it.
B：他的反应非常积极。
1) 对某事做出反应或回应
2) 化学或物理层面的反应
1. 做出反应，回应
verb
1. to act in response to something
Synonym: respond, reply