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react

Word family 
Related topics: Chemistry, Illness & disability
re·act /riˈækt/ ●●● S3 W3 AWL verb [intransitiveI]  
1  behaviour/feelings 行为/情感REACT to behave in a particular way or show a particular emotion because of something that has happened or been said （作出）反应 → respond
react to
 How did Wilson react to your idea?
威尔逊对你的想法有什么反应？
 He reacted angrily to the suggestion that he had lied.
说他撒谎，他非常生气。
 She reacted very badly (=was very upset) when her parents split up.
父母离婚的时候，她非常难过。
 You have to react quickly to circumstances.
你必须对形势迅速作出反应。
react by doing something
 The government reacted by declaring all strikes illegal.
政府作出反应，宣布所有罢工行动都是非法的。
→ overreact
2  chemicals 化学品 technicalHC if a chemical substance reacts, it changes when it is mixed with another chemical substance 起化学反应
react with
 The calcium reacts with sulphur in the atmosphere.
钙和硫在空气中会发生化学反应。
3  prices 价格 if prices or financial markets react to something that happens, they increase or decrease in value because of it 〔价格、金融市场〕作出反应
react to
 Oil prices reacted sharply (=reacted a lot) to news of the crisis in the Middle East.
石油价格对中东危机的消息反应强烈。
 The market reacted favourably to the announcement.
市场对这则公告反响良好。
4  become ill 生病MI to become ill when a chemical or drug goes into your body, or when you eat a particular kind of food 〔因使用某种化学品、药物或食用某种食物〕产生不良反应 → respond
react to
 Quite a lot of children react badly to antibiotics.
很多儿童对抗生素有不良反应。
5 react against something phrasal verbphr v REACTto show that you dislike someone else’s ideas or ways of doing something, by deliberately doing the opposite 反对；反抗
 He reacted strongly against his religious upbringing.
他强烈反对从小所受的宗教教育。
Examples from the Corpus
react against • It was a revolution so decentralized and individualistic that there was nothing for the state to react against.• To understand the classicists it helps to have some understanding of what they were reacting against.• Unwin and Parker reacted against a Victorian excess of ornament, which required endless dusting by an army of servants.• Immunohistochemical staining using antiserum reacting against complement factor C3d was used to visualize neuritic plaques.• They reacted against factory-produced Victorian furniture with its frilly fretwork, clawed feet and laminated woods.• Chaim Soutine s Expressionism can partly be explained by his determination to react against it.• For rather similar reasons, Darwin reacted against Lamarck's idea that organisms have an inner drive to evolve greater complexity.• Rather than reacting against the political orientations of their families, they tend to extend the extremism of their families' views.
reacted strongly• Sandra's father also reacted strongly.• He grabbed toys from other kids and reacted strongly to any sign of aggression from them.• More importantly, he had a metabolism which reacted strongly to crisis.• There is no doubt that part of the Catholic community in Britain reacted strongly to the destruction and damage of Catholic churches.• Shares in privatised companies reacted strongly to the possibility of a Tory-dominated hung Parliament.
n COLLOCATIONS
adverbs
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.
Examples from the Corpus
react• How will your best friend react?• Emma is not behaving very reasonably nowadays. I think she's reacting against her teachers' strictness.• Ned reacted angrily to Bill's comments.• The chairman reacted angrily to the report and said it would make it much harder to reach a deal.• Foam began to spread through the air as the fire-fighting systems reacted automatically to the emergency.• It's hard not to react badly when your kids are playing up.• A shot was fired, and the police reacted by firing into the crowd.• Nobody reacts much when older men become fathers.• Suddenly, before the competition could react, Snapple was in stores all across the country.• Cool foresight and a quick mind enabled him to react swiftly in an emergency.• The authorities reacted swiftly with a smear counterattack.• People reacted to the speech in different ways.• Only two persons in the audience reacted to this sentence, but to them it was like being doused with ice-cold water.• Investors reacted unfavorably to the announcement and pushed shares down as much as 3. 9 percent.• How did Dad react when he found out Vicky was pregnant?• How did she react when you told her the news?• How did your parents react when you told them you were going to marry Jim?• When children perform poorly at school, parents often react with anger.• Many gays reacted with outrage at the tactic of "outing" senior public figures.
react to• The patient reacted badly to penicillin.• Residents reacted angrily to the city council's decision.
reacted sharply• Critics of the reforms reacted sharply last night.
react badly• Chances were she would react badly.• Some mares react badly and their reproductive cycles cease or are disrupted.• Do you react badly to criticism at work?• Bird lovers reacted badly to earlier attempts to control the birds by poisoning them and removing nests.• They don't like it too hot in summer and they react badly to over-watering.• Others began to react badly to various chemicals at about the time they developed candidiasis.• But it reacted badly when he started on examples of government action to extend opportunity.
From Longman Business Dictionary
reactre·act /riˈækt/ verb [intransitiveI]
FINANCEto start rising or falling in price, level etc because of something that has happened or that has been said
react to
The stock market reacted favorably to the announcement.
Oil prices reacted only mildly to news of the cut in Saudi production.
re·act verb →n COLLOCATIONS1
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