話到嘴邊留三分

hua4 dao4 zui3 bian1 liu2 san1 fen1

A still tongue makes a wise head. (idiom)

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話到嘴邊留三分|话到嘴边留三分 [huà dào zuǐ biān liú sān fēn] ► A still tongue makes a wise head. (idiom)