We don't smoking in the lecture room.

我们不允许在大教室抽烟。

We don't permit smoking in the lecture room.

我们不允许在大教室抽烟。

We don't people to smoke in the lecture room.

我们不允许人们在大教室抽烟。

We don't permit people to smoke in the lecture room.

我们不允许人们在大教室抽烟。

We don"t permit people to smoke in the lecture room."

我们不允许人们在大教室抽烟。