Signs across the entrances warn all visitors to stub out their cigarettes.

入口处的标牌告诫所有参观者要掐灭他们的香烟。

What about the other two entrances?

那另外两个入口呢？

We practise entrances and exits.

我们练习入场和出场。

The police roadblocked all entrances.

警察在各入口处都设置了路障。

All entrances to the city are guarded by the police.

进城的所有入口都有警察守卫。