adj. 1.【天文学】行星的；由于行星作用的。 2.流浪的，不定的。 3.俗世的，现世的；地球的。 4.【机械工程】行星齿轮的。 短语和例子 planetary days 一星期。 a planetary gear (汽车的)行星齿轮。 a planetary hour 行星时。 planetary motions 行星运动。 the planetary system 太阳系。
of or relating to or resembling the physical or orbital characteristics of a planet or the planets; "planetary motion"; "planetary year" 同义词：planetal,
of or relating to or characteristic of the planet Earth or its inhabitants; "planetary rumblings and eructations"- L.C.Eiseley ; "the planetary tilt"; "this terrestrial ball" 同义词：terrestrial,
involving the entire earth; not limited or provincial in scope; "global war"; "global monetary policy"; "neither national nor continental but planetary"; "a world crisis"; "of worldwide significance" 同义词：global, world, worldwide, world-wide,
having no fixed course; "an erratic comet"; "his life followed a wandering course"; "a planetary vagabond" 同义词：erratic, wandering,
例句与用法
1.
Rather, we infer that planetary systems must be quite common . 相反，我们的结论是行星系统的存在一定相当普遍。
2.
Planetary perturbations make the earth's orbit about the sun irregular . 行星的摄动使得地球绕太阳的轨道是不规则的。
3.
These bands must introduce longitudinal asymmetry in the planetary albedo . 这些云带必定引起行星反照率的经向不对称性。
4.
It is reasonable to suppose that other stars are also attended by planetary system . 有理由猜测别的恒星也伴有行星系统。
5.
New discoveries about uranus excited planetary astronomers in 1977 . 一九七七年对天王星的几项新发现振奋了行星天文学家。
6.
The sciences of planetary geology have benefited tremendously from these new finds . 行星地质科学从这些新发现中受益匪浅。
7.
Many objections can be raised to this picture of planetary nebula formation . 形成行星状星云的这一图像可能会引起许多异议。
8.
During the early stages of planetary evolution they served to sweep the solar system . 在行星演化的早期，他们用来清扫太阳系。
9.
Travel to the planetary systems of other stars is a much more formidable undertaking . 要航行到其他恒星的行星系中去是件极难实现的事。
10.
Very accurate predictions of planetary orbits require corrections to the central-field approximation . 想要非常准确地预言行星的轨道，就需要对中心场近似进行修正。
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