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sidereal day在线翻译
恒星日；
6. sidereal day什么意思
1. 恒星日[天]：side weir 侧堰 | sidereal day 恒星日[天] | sidereal hour 恒星小时[天]
sidereal day
1. sidereal day的翻译
noun
1. the time for one complete rotation of the earth relative to a particular star, about 4 minutes shorter than a mean solar day
Synonym: day
