exchange的同义词是什么

　　trade尤指买卖货物，也可表示交换物品。

　　例句：

　　The exchange of prisoners took place this morning.

　　今天早上交换了俘虏。

　　What is needed is a frank exchange of views.

　　需要的.是坦诚地交换意见。

　　We need to promote an open exchange of ideas and information.

　　我们需要促进思想和信息的公开交流。