They're also littering in public places.

他们也在公共场所乱扔垃圾。

No smoking in public places.

公共场所禁止吸烟。

You must not smoke in public places.

你不得在公共场所吸烟。

Please do not spit in public places.

请不要在公共场所吐痰。

She opposes smoking in public places.

她反对在公共场所吸烟。

We should keep quiet in public places.

我们应该在公共场所保持安静。

We should keep in public places clean.

我们应该保持在公共场所的清洁。

Smoking in public places is forbidden.

在公共场所吸烟是被禁止的。

Smoking is prohibited in public places.

吸烟在公共场所是禁止的。

Smoking is not allowed in public places.

在公共场所吸烟是不允许的。