这不是一双靴子，这是一条裤子。

This isn't a pair of boots. It's a pair of pants.

youdao

我的箱子里有一双运动鞋、三件衣服、一条裤子。

There is a pair of sports shoes, three pieces of coats and a pair of trousers in my case.

youdao

如果你不小心，你可能会买下一条标价2.5折的裤子，随后发现只有再买一双鞋和它搭配，否则根本穿不了。

If you're not careful, you can buy a pair of pants marked down 75%, then realize that you can't really wear them unless you buy the right shoes to go with them.

youdao