名词
中文翻译：接触交换
同义词：
['contact exchange', 'contact swap', 'contact transfer']
例句：
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1. In thisexperiment, we used a contact exchange to test the effectiveness of our new communication system.
在这个实验中，我们使用接触交换来测试我们的新通信系统的有效性。
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2.The contact exchange between the two countries has been improving steadily over the years.
两国之间的接触交换多年来一直在稳步改善。
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3. During the contact exchange, both parties discussed their concerns and made plans for future cooperation.
在接触交换期间，双方讨论了他们的担忧并制定了未来合作的计划。