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year - definition of year by The Free Dictionary
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日期:2024-04-27
year (yîr) n. 1. a. The period of time during which Earth completes a single revolution around the sun, consisting of 365 days, 5 hours, 49 minutes, and 12 seconds of mean solar time. In the Gregorian calendar the year begins on January 1 and ends on Dece...看更多