动词短语
中文翻译：买卖
同义词：
['trade', 'engage in', 'undertake']
例句：
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1. The monks were busy buying and selling goods in the market.
僧侣们忙于在市场上买卖商品。
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2. He has been engaged in the business of trading for many years.
他已经从事贸易业务多年了。
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3. She undertook the task of teaching English to foreign students.
她接受了教授外国学生英语的任务。