Newton's first law of motion is not as self-evident as it may seem. 牛顿第一运动定律并不是一看就能明白的。
A coordinate system in which Newton's first law of motion is valid. 牛顿第一运动定律成立的参照系统。
According to newton's first law of motion a body is in motion but actually never is there a body which will remain in motion forever because it is impossible to get rid of external influence. 根据牛顿第一定律,运动的物体会一直运动,但实际上决不会有一直运动的物体,因为它不可能摆脱外部作用力的影响。
Dialectical understanding newton's first law of motion 牛顿第一定律的理性反思