Dictionary/约定俗成

约定俗成 約定俗成

约定俗成 yuē dìng sú chéng

ㄩㄝ ㄉㄧㄥˋ ㄙㄨˊ ㄔㄥˊ
HSK 7-9
1established by popular usage (idiom); common usage agreement
2customary convention

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