英国 å’Œ 马æ¥è¥¿äºš çš„ 时差
The deeper part of a river or harbor especially a deep navigable passage. å果想çœæåšä¾å ，åœäŠæ¹è¾åä½ çšä¹ éã äºèæåšçŸè，åé¼ …
365 Days in a Year
A tropical year - also called many other things - is approximately 365 days 5 hours 48 minutes and 45 seconds long. Why are there…
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