re‧act S3 W3 AC / riækt / 动词 [不及物动词]
1 behaviour/feelings to behave in a particular way or show a particular emotion because of something that has happened or been said → respond
react to
How did Wilson react to your idea?
He reacted angrily to the suggestion that he had lied.
She reacted very badly (= was very upset ) when her parents split up.
You have to react quickly to circumstances.
react by doing something
The government reacted by declaring all strikes illegal. → overreact
2 chemicals technical if a chemical substance reacts, it changes when it is mixed with another chemical substance
react with
The calcium reacts with sulphur in the atmosphere.
3 prices if prices or financial markets react to something that happens, they increase or decrease in value because of it
react to
Oil prices reacted sharply (= reacted a lot ) to news of the crisis in the Middle East.
The market reacted favourably to the an 名词 cement.
4 become ill to become ill when a chemical or drug goes into your body, or when you eat a particular kind of food → respond
react to
Quite a lot of children react badly to antibiotics.
COLLOCATIONS
副词
react badly (= become annoyed, upset etc ) Do you react badly to criticism?
react angrily/violently The Prime Minister reacted angrily to these accusations.
react strongly Scott reacted strongly when he felt he was being treated unjustly.
react quickly/swiftly The goalkeeper had to react quickly.
react differently People react differently to stress.
react positively/negatively (= with positive/negative emotions or opinions ) We want versatile people who react positively to change.
react cautiously (= carefully, so that you avoid danger or risk ) The United States has reacted cautiously to the offer.
react instinctively (= without thinking or needing to think ) She reacted instinctively and reached for her gun.
react against something 短语动词
to show that you dislike someone else’s ideas or ways of doing something, by deliberately doing the opposite :
He reacted strongly against his religious upbringing.