He shouted at us to pipe down.

他大声叫我们静下来。

In other words, it's time to pipe down.

换句话说，它的时间来管了。

Pipe down! "We shouted to the noisy girl."

“静下来！”我们向那个闹腾的小女孩喊道。

Put that pipe down, it's bad for your health!

那旱烟有什么好吧唧的，有害健康！

We had to force the pipe down a narrow hole to get it through.

我们不得不迫使管子通过一个狭口。