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单词 menstrual equation
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menstrual equation
menstrual equation n. Astronomy Obsolete the apparent monthly displacement of the position of the sun in the sky owing to the gravitational pull that the moon exerts on the earth.
ΚΠ
1833 J. F. W. Herschel Astronomy ix. §451. 289 An apparent monthly displacement of the sun..which is called the menstrual equation.
extracted from menstrualadj.n.
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更新时间:2024/12/22 21:53:26