由相对论原理可知，牛顿运动第二定律尽管是古典力学中的基本原理，但只是近似的，而绝不是完全正确的。
It follows from the principle of relativity that Newton's second law of motion, although fundamental in classical mechanics, only has an approximate and by no means complete validity.
由相对论原理可知，牛顿运动第二定律尽管是古典力学中的基本原理，但只是近似的，而决不是完全正确的。
It follows from the principle of relativity that Newton's second law of motion although fundamental in classical mechanics only has an approximate and by no means complete validity.
开普勒第二定律说到，首先每个行星的运动都保持在同一平面内。
So, what Kepler's second law says is that the motion of planets is, first of all, they move in a plane.
应用推荐