星级典句：

第一句：I'd like to buy some souvenirs.

我想买些纪念品。

A: I'd like to buy some souvenirs. Where can I buy some?

我想买些纪念品。在哪儿能买到呢？

B: There is a Friendliness Store which sells souvenirs to foreign visitors.

这儿有一个友好商店，专门向外国游客出手纪念品。

第二句：Where can I buy some souvenirs?

我在哪儿能买到纪念品？

A: Where can i buy some souvenirs?

我在哪儿能买到纪念品？

B: you can go to the duty-free stores. It's cheap there.

你可以去免税商店，那儿的东西便宜。

其他表达法：

I want to buy some souvenirs.

我想要买一些纪念品。

I want to bring back some souvenirs for my friends.

我想给我的朋友们带一些纪念品回去。