券是一种小纸片或卡片，用来证明你可以做某件事，比如坐车、看电影或者买东西。

A 券 is a small piece of paper or card used to prove you can do something, like take a bus, watch a movie, or buy something.

我们常常说门票、车票和优惠券。

We often talk about tickets, bus tickets, and discount 券.