kepler's law of planetary motion
常見例句
- The Laws of Planetary Motion Kepler's First Law: The orbits of the planets are ellipses, with the Sun at one focus of the ellipse.
行星沿橢圓軌道繞太陽運行,太陽位于橢圓的一個焦點上。 對任一個行星說,它的徑矢在相等的時間內(nèi)掃過相等的面積。 返回 kepler's law of planetary motion