不然，就闭上你的嘴巴。
空话是没有任何意义的。如果你要道歉，那就真心诚意。不然，就闭上你的嘴巴。
There is never any point in empty sentences. If you apologize, mean it. Otherwise keep your mouth closed.
当发' m这个音时，你必须闭上嘴巴让空气从鼻子出来。
To make an m, you have to close your mouth and the air has to come out your nose.
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