“ephemeris second”的概念、定义、翻译、参考文献-科学参考

单词	ephemeris second
释义	ephemeris second [ǝ`fem·ǝ·rǝs `sek·ǝnd] ^ASTRONOMY The fundamental unit of time of the International System of Units of 1960, equal to 1/31556925.9747 of the tropical year defined by the mean motion of the sun in longitude at the epoch 1900 January 0 day 12 hours.
随便看	lattice drainage pattern lattice dynamics lattice energy lattice filter choleglobin cholelithiasis cholera cholera morbus cholera vibrio cholerophobia cholesteatoma cholesteric material cholesteric phase cholesterol cholic acid choline cholinergic cholinergic nerve cholinesterase choline succinate dichloride dihydrate choluria cholytaurine Chondrichthyes chondrification chondrin

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