名词
中文翻译：Unknown
同义词：
['replacement', 'substitute', 'alternative']
例句：
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1. The doctor prescribed a substitute for the pain medication.
医生开了一种替代止痛药的药。
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2. She substituted her own expertise for his inexperience.
她用自己的专业知识取代了他的经验。
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3.He substituted his seat for someone who was sitting next to him.
他把自己的座位让给了坐在他旁边的人。