动词
中文翻译：交换
同义词：
['trade', 'swap', 'transact例句：1. They exchanged pleasantries before the meeting began.（会议开始前，他们进行了友好的寒暄。）']
例句：
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1. They exchanged pleasantries before the meeting began.
会议开始前，他们进行了友好的寒暄。
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2.The company exchanges its stocks for foreign currency.
该公司用其股票兑换外币。
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3. Exchange rates fluctuate frequently due to market demand.
由于市场需求，汇率经常波动。