名词
中文翻译：Unknown
同义词：
['trade', 'swap', 'transact', 'circulate', 'interchange']
例句：
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1. They exchanged pleasantries witheach other before the meeting.
会议前，他们彼此问候。
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2. The company exchanges itsshares on a stock exchange.
该公司的股票在证券交易所上进行交易。
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3. The two countries havebeen exchanging diplomatic notes since the signingof the peace treaty.
自和平条约签署以来，两国一直在交换外交照会。