Warning: file_put_contents(/www/wwwroot/ppbbu/80125.cn/cache/d691fc02ae1c4f7942e8dbba91f001fd.txt): failed to open stream: No space left on device in /www/wwwroot/ppbbu/80125.cn/index.php on line 58 kepler's law of planetary motion是什么意思，kepler's law of planetary motion的翻译，kepler's law of planetary motion音标、读音、用法和例句_食材鋪反向词典
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，太陽位於橢圓的一個焦點上。 對任一個行星說，它的逕矢在相等的時間內掃過相等的麪積。