Demands for his dismissal have gathered momentum in recent weeks.最近几周，要求将他解职的呼声越来越高。The fight for his release gathers momentum each day.争取使他获释的斗争声势日益加强。The sledge gained momentum as it ran down the hill.雪橇从山上下冲时的动力越来越大....
This obviously derails the forward - momentum process.很明显这是前进途中的一大障碍.Longitudinally polarized electrons are the electrons with spin and momentum pointing in the same direction.纵向极化电子,就是自旋和动量方向相同的电子.In the case of populat...