小声点英文

1 Could you lower your voice please?2. Please use your indoor voice.(That is what I always say to my students.)3.Keep your voice down, please!

Speak lower

么么哒 么么哒哒

1.叹词，表示不满或提醒：～，你怎么没来呢！～，你们看，谁来了！2表示满意或赞叹[yes]。如:哎,这就对了!3表示提醒[lookout]。如:哎,小声点4表示醒悟[aha]。如:哎!原来是这样5表示招呼[hello]。如:哎,大婶,我们回头再来看你6表示答应[yes]。如:“李梅!”“哎!我在给病人换药,一会儿就来。”

be quiet

Hush!最常见的说法。或者（Slient!)都是可以的。

Please keep your voices low.Please speak in low voices.Quiet please.