我们研究运动的规律。
Newton put forward three laws of motion in the book.
在书中，牛顿提出三个运动定律。
Newton's laws of motion do not single out a direction of time.
牛顿时的运动定律适用于地球上一切东西。
Further, all the laws of nature that govern the particle motion are not known.
再者，支配粒子运动的一切自然规律也都是未知的。
Sample topics include: Brief review of basic laws of fluid motion.
课程主题列举如下：流体运动基本定律的简单回顾；
Sample topics include: Brief review of basic laws of fluid motion.
课程主题列举如下：流体运动基本定律的简单回顾；
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