| 单词 | reaction |
| 释义 | Word Frequency reaction(rɪˈækʃən) noun ▶ USAGE Reaction is used to refer both to an instant response (her reaction was one of amazement) and to a considered response in the form of a statement (the Minister gave his reaction to the court's decision). Some people think this second use is incorrect1. a response to some foregoing action or stimulus 2. the reciprocal action of two things acting together 3. opposition to change, esp political change, or a desire to return to a former condition or system 4. a response indicating a person's feelings or emotional attitude 5. medicine a. any effect produced by the action of a drug, esp an adverse effect Compare side effect b. any effect produced by a substance (allergen) to which a person is allergic 6. the simultaneous equal and opposite force that acts on a body whenever it exerts a force on another body 7. short for chemical reaction, nuclear reaction 8. stock exchange a sharp fall in price interrupting a general rise Derived forms reactional (reˈactional) adjective |
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