Momentum conservation is a consequence of Newton's laws. 動(dòng)量守恒是牛頓定律的一個(gè)推論。
In this chapter we develop the implication's of momentum conservation in the motion of a collection of particles. 在本章中,我們要揭示一個(gè)質(zhì)點(diǎn)集體作運動(dòng)時(shí)動(dòng)量守恒的含義。