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回归年与恒星年是不同的两个概念。
Tropical year, and sidereal year are two different concepts.
youdao
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在即回归年与恒星年是不同的两个概念。
Tropical year , and sidereal year are two different concepts .
youdao
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在即回归年与恒星年是不同的两个概念。
Tropical year , and sidereal year are two different concepts .
youdao