“lunar nutation”的概念、定义、翻译、参考文献-科学参考

单词	lunar nutation
释义	lunar nutation [`lü·nǝr nü`tā·shǝn] ^ASTRONOMY A nodding motion of the earth's axis caused by the inclination of the moon's orbit to the ecliptic; it can displace the celestial pole by 9 seconds of arc from its mean position and has a period of 18.6 years.
随便看	unitized body unitized cargo unitized film unitized load unitized tooling unit length unit load unit loading unit magnetic pole unit mold unit normal unit of coal unit of fire unit of issue unit operations unit operator unitor unit power unit process unit procurement cost unit pulse unit record unit record device unit replacement unit reserves

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