reaction

US /riˈæk.ʃən/
UK /riˈæk.ʃən/
"reaction" picture
1.

反应, 回应

an action or feeling provoked by an event or situation

:
His immediate reaction was to call for help.
他立即的反应是呼救。
What was her reaction to the news?
她对这个消息有什么反应
2.

反应, 化学反应

a chemical process in which two or more substances interact to form new substances

:
The experiment involved a complex chemical reaction.
这个实验涉及一个复杂的化学反应
Heat can accelerate the reaction.
热量可以加速反应