In the previous section, we exchanged a secret key.
在前一节中，我们交换了一个秘钥。
I met Frank at a bus stop this afternoon and we exchanged a few words.
我今天下午在一个公共汽车站碰见了弗兰克，我们聊了几句。
The part where we exchanged marriage vows.
互诉结婚誓词的那幕。
We exchanged a few words, and she left.
我们说了几句话之后，她离开了。
We exchanged our copy machine.
我们把复印机换新的了。
We exchanged our opinions about the event at the meeting.
在会上，我们就此事交换了意见。
We exchanged our opinions about the event at the meeting.
在会上，我们就此事交换了意见。
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