名词
中文翻译：反作用
同义词：
['effect', 'consequence', 'result']
例句：
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1.The back reaction of the drug on the body was unexpectedly positive.
这种药物对身体的反作用出乎意料地积极。
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2. The scientist's back reaction to the results was disappointment.
科学家对结果的反作用是失望。
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3.The back reaction of the new policy on the economy was significant.
新政策对经济产生的反作用是显著的。