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| NOUN |
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| /riˈækʃn/ |
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| 1 | C the way you feel or behave as a result of something that happens 反应 |
| My mother’ s initial reaction was quite unexpected. 我母亲最初的反应是感到很意外。 |
| | 1a | a sudden feeling of being tired , upset etc, for example after an unpleasant or exciting experience （不愉快、兴奋等引起的）反应（如疲倦或沮丧等） | | The reaction of any individual trauma victim is difficult to predict. 很难预测每个人对各自所遭受的创伤有何种反应。 | | +to Shock is a natural reaction to such bad news. 感到震惊是听到这些坏消息后的自然反应。 | |
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| 2 | C a bad effect on your body caused by food , medicine , or another substance （由食物或药物引起的）不良反应 |
| +to Some people’ s skin has an allergic reaction to certain types of fabric. 有些人的皮肤对某些纺织品有过敏反应。 |
| have/suffer a reaction He suffered a violent reaction to the medicine. 他对这种药物有强烈的不良反应。 |
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| 3 | reactions plural your ability to think and act quickly in a difficult or dangerous situation 反应能力；反应灵敏度 |
| A tragedy was only prevented by the driver’ s quick reactions. 司机反应迅速从而避免了一场悲剧的发生。 |
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| 4 | C science a process in which a chemical change happens 化学反应 |
| Temperature can affect the rate of a chemical reaction. 温度可以影响化学反应的速度。 |
| +between We are studying reactions between a number of metals and acids. 我们正在研究一些金属和酸之间的化学反应。 |
| | 4a | C/U a physical force that is caused by an opposite physical force , usually producing a form of energy 反作用力 | | a nuclear reaction 核反应 | | Newton teaches that action and reaction are equal and opposite. 牛顿认为作用力与反作用力大小相等，方向相反。 | |
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| 5 | singular an attitude of wanting to do things in a different way from the way they were done in the past 反对；反抗；对抗 |
| +against The reaction against traditional styles continued for another 50 years. 与传统风格的对抗又持续了50年。 |
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| 6 | U formal strong opposition to any social or political change 反动；守旧；保守 |
| the forces of reaction 反动势力 |
| Words frequently used with reaction | | reaction 的常见搭配词 | | adjectives | adverse, emotional, gut, immediate, initial, instinctive, knee-jerk, natural, violent, | 1 | | verbs | cause, produce, provoke, trigger, | 2 | | | |
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