period of revolution
柯林斯詞典
1. N the mean time taken for one body, such as a planet, to complete a revolution about another, such as the sun 公轉(zhuǎn)周期[astronomy]
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1. N the mean time taken for one body, such as a planet, to complete a revolution about another, such as the sun 公轉(zhuǎn)周期[astronomy]