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单词 planetary year
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planetary year
planetary year n. [compare French année planétaire (1701)] Astronomy the period of revolution of a planet round a star, esp. of a planet of the solar system around the sun.
ΚΠ
1890 Cent. Dict. at Planetary Planetary years, the periods of time in which the several planets make their respective revolutions round the sun.
1958 Brit. Jrnl. Philos. Sci. 9 237 He explains the different length of the different planetary years by assuming a fixed proportion between each planet's year and its distance from the sun.
1994 Callaloo 17 253 It had taken ten planetary years before to reach a consensus to lift the self-imposed planetary isolation and send the expedition team to old Earth.
extracted from planetaryadj.n.
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