trade尤指買(mǎi)賣(mài)貨物，也可表示交換物品。
例句：
The exchange of prisoners took place this morning.
今天早上交換了俘虜。
What is needed is a frank exchange of views.
需要的是坦誠(chéng)地交換意見(jiàn)。
We need to promote an open exchange of ideas and information.
我們需要促進(jìn)思想和信息的公開(kāi)交流。