1.impair= damage or make sth work poorly=undermine=weaken=spoil(削弱或损害)
2.常见词伙
2.1过劳,睡眠不足impair your health
2.2过长的演讲impair the effectiveness of the speech
2.3霜冻会impair the fruit crop
2.4缺乏足够的排练会impair the quality of musical production
3.impair 的名词是impairment,比如,争吵会result in the impairment of a marriage
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