1590s; see planet + -ary. Probably from Late Latin planetarius "pertaining to a planet or planets," but this is attested only as "an astrologer." Planetary nebula, so called for its shape, attested from 1785.
雙語例句
1. Within our own galaxy there are probably tens of thousands of planetary systems.
在我們自己的星系里可能有數以萬計的行星系。
來自柯林斯例句
2. These bands must introduce longitudinal asymmetry in the planetary albedo.
這些云帶必定引起行星反照率的經向不對稱性.
來自辭典例句
3. Very accurate predictious of planetary orbits require corrections to the central - field approximation.
想要非常準確地預言行星的軌道,就需要對中心場近似進行修正.
來自辭典例句
4. The sciences of planetary geology have benefited tremendously from these new finds.
行星地質科學從這些新發現中受益匪淺.
來自辭典例句
5. New discoveries about Uranus excited planetary astronomers in 1977.