ephemerisn.
英 ɪ'fem(ə)rɪs; -'fiːm- | 美 ɪ'fɛmərɪs
中文n. 星历表，历书；短命的东西；日历，日记
词根词源
ephemeris (n.)table showing predicted positions of heavenly bodies, 1550s, Modern Latin, from Greek ephemeris "diary, journal, calendar," from ephemeros "daily" (see ephemera). The classical plural is ephemerides.
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