| 单词 | 由来已久 |
| 释义 | 由来已久由来已久[yóu lái yǐ jiǔ]1.■long-standing; time-honoured; be as old as the hills; It has been for a long time.; There has been many a peck of salt eaten since.:这种风俗由来已久。This is a time-honoured custom. |
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