ephemeris time
参考词典中ephemeris time的常规释义：
基本释义
- 历书时，星历表时间
英英解释
1个名词解释
- (astronomy) a measure of time defined by Earth's orbital motion; terrestrial time is mean solar time corrected for the irregularities of the Earth's motions
[同] ephemeris time, tdt, terrestrial dynamical time, terrestrial time, tt
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