keep it down

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释义
小点声
To restrain or control (a sound).

例句
Mr. Heckles: I could play the oboe!
Phoebe: Then I'm gonna have to ask you to keep it down. (Friends)
海克勒斯：我本可以吹双簧管的！
菲比：那我们必须得请您小声点了。（老友记）