If the impulse is zero, there is no change in momentum.

如果冲量为零，则动量不变。

youdao

This force on the gun will cause a change in momentum for the gun - that's recoil.

施予枪的力将导致枪的动量改变-这就是后座力。

youdao

So the individual stars will change their momentum all the time, because the individual particles in the individual stars will experience, of course, the internal forces.

而那些单个星星，会不停地改变动量，因为单个粒子，在单个星星中的，当然会受到，内力。

youdao

"There has definitely been a change in momentum on the positive side, " said Colin Kinsella, CEO of ad agency Digitas North America.

WSJ: Facebook Revenue Rises 40% as Mobile Ad Sales Strengthen

Allardyce desperately needed a change in momentum and introduced striker Jason Roberts for Nikola Kalinic - a decision not popular with the local fans.

BBC: El-Hadji Diouf celebrates his equaliser

As Forbes has observed, companies that consistently score at the top in terms of EVA Momentum (the change in economic profit as a percentage of trailing sales) also tend to produce outsize returns for shareholders.

FORBES: Cephalon, KLA-Tencor Stand Out Among Top Profitability Performers