动词
中文翻译：交换
同义词：
['communicate', 'swap', 'transact']
例句：
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1.They exchanged pleasantries with each other before the meeting.
会议前，他们互相寒暄。
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2.The two countries have been exchanging diplomats for years.
两国多年来一直在互派外交官。
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3. She exchanged her old phone for a new one.
她用她的旧手机换了一个新手机。