动词
中文翻译：交换
同义词：
['trade', 'swap', 'transact', 'circulate']
例句：
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1. The companyexchanged its shares for new ones.
该公司用新股票换回了旧股票。
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2. Theyexchanged pleasantries with each other beforethe meeting began.
会议开始前，他们互相寒暄。
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3. Exchange rates fluctuate frequently due to global economic conditions.
由于全球经济状况的变化，汇率经常波动。