名词
中文翻译：交换
同义词：
['trade', 'swap', 'transact例句：1. They exchanged pleasantries with each other.（他们互相问候。）']
例句：
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1. They exchanged pleasantries with each other.
他们互相问候。
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2. The company exchanges its shares every quarter.
这家公司每季度交换其股票。
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3. He exchanged his old watch for a new one.
他用自己的旧手表换了一只新的。