an exchange student

交换生

We must promote an exchange of ideas and information.

我们必须促进思想和信息的交流。

Would you like my old TV in exchange for this camera?

用我的旧电视机换这部照相机，你愿意吗？

The store's policy is not to allow returns or exchanges.

这家商店的规定是商品概不退换。

foreign exchange

外汇

an exchange rate

汇率

New York Stock Exchange

纽约证券交易所

exchange views / ideas

交换意见/交流思想

Before graduation, students exchange presents with each other.

毕业前，同学们互赠礼物。

I'd like to exchange this dress for one of a larger size.

我想把这件衣服换一件大点儿的。

You can exchange your currency for dollars in the hotel.

你可以在旅馆把钱兑换成美元。