Motion, however, as the unityoftime and space, is a connection which is purely abstract and external.
运动作为空间和时间的统一,然而事实完全外在的和抽象的关系。
2
It's necessary to pay attention to the unityoftime and space for each particle velocity, when analysing the question for particle system use momentum conservation law.
利用动量守恒定律分析质点组问题时,必需注意质点组各质点速度的空间统一性和时间统一性。
3
The first problem, at least in terms oftime, is unity.