单词	sidereal year
释义	sidereal year noun plural sidereal years : the time in which the earth completes one revolution in its orbit around the sun measured with respect to the fixed stars : 365 days, 6 hours, 9 minutes, and 9.5 seconds of mean time The light-year is defined as the distance light travels in 1 sidereal year … William D. Johnstone Word History First Known Use 1765, in the meaning defined above
随便看	boring block boring clam boring head boring machine boring mill boring mussel boring rod boring sponge boring tool boring tube boringlier boringliest boringly boringness boringnesses borings Borinqueño Boris III bority bork borked borking borks Borlaug borlotti

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