tropical year
参考词典中tropical year的常规释义：
基本释义
- n. 回归年
英英解释
1个名词解释
- the time for the earth to make one revolution around the sun, measured between two vernal equinoxes
[同] equinoctial year, astronomical year, solar year, tropical year
点击查看……- the time for the earth to make one revolution around the sun, measured between two vernal equinoxes
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