英语词汇“mean libration”的英英意思、用法、释义、翻译、读音、例句、短语、词组-英语词典

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mean libration

mean libration n. Astronomy the mean orientation of the moon as visible from Earth, considered as an ‘average’ of its apparent oscillations (see libration n. 2).

ΚΠ

1875 Encycl. Brit. II. 801/2 The subjoined engraving..gives a pretty accurate view of the appearance of the moon in her mean libration.

1961 V. A. Firsoff Moon Atlas 13/1 The following Quadrant Maps are not corrected to the mean libration.

1998 Mod. Astronomer Mar. 44/3 Beyond the Moon's limb at mean libration, the Dörfel mountains tower over Bailly at its western extreme.

extracted from meanadj.²

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单词	mean libration
释义	> as lemmas mean libration mean libration n. Astronomy the mean orientation of the moon as visible from Earth, considered as an ‘average’ of its apparent oscillations (see libration n. 2). ΚΠ 1875 Encycl. Brit. II. 801/2 The subjoined engraving..gives a pretty accurate view of the appearance of the moon in her mean libration. 1961 V. A. Firsoff Moon Atlas 13/1 The following Quadrant Maps are not corrected to the mean libration. 1998 Mod. Astronomer Mar. 44/3 Beyond the Moon's limb at mean libration, the Dörfel mountains tower over Bailly at its western extreme. extracted from meanadj.² < as lemmas
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