free是自由，那smoke free可以自由吸烟？千万别理解错了！

Smoke-free 无烟的

Sir. This is a smoke-free restaurant. You can't smoke here.

先生。这是无烟餐馆。您不能在这吸烟。

No smoking or vaping.

禁止吸烟或吸电子烟

vape v. 吸电子烟

e-cigarette 电子烟

alcohol-free 不含酒精的

A: I am sorry I can't drink alcohol.

不好意思我不能喝酒。

B: Don't worry. It's an alcohol-free drink.

别担心。这个酒不含酒精。

duty-free 免税的

We got a lot of duty-free stuff while we were waiting at the airport.

候机的时候我们买了很多免税的东西。

sugar-free 不含糖的

Sugar-free gum does not have any sugar in it. So it doesn't cause tooth decay.

无糖口香糖不含糖。所以不会引起蛀牙。

interest-free 无息的

The card offers 59 days' interest-free credit.

该卡提供59天免息的额度。

stress-free 没有压力的

No working environment is entirely stress-free.

没有哪个工作环境是完全不存在压力的。