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to pipe down
[phrase form: pipe]
01
变得安静
to stop talking or making noise
02
管道向下
to cause someone or something to become quiet
例子
Whenever the teacher enters, the students usually pipe down.
The birds have piped down since the rain started.
I can't hear the movie because the kids are not piping down.
If the noise continues, I'll ask them to pipe down.
The moment the principal stepped onto the stage yesterday, the assembly piped down.
