拼音：chū rén kǒu，rù rén ěr
注音：ㄔㄨㄖㄣˊㄖㄣˊㄦˇ
解释：原指两人私下谈话，第三者不会知道。后多指话一说出口，就会为人们传开。
出处：《左传·昭公二十年》：“言出于余口，入于尔耳，谁告建也。”
It originally means that two people talk in private and the third party won't know. When the latter refers to words, they will spread to people.
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