He was willing to make any sacrifice for peace.他愿意为和平作出任何牺牲。The great magicians of old always invoked their gods with sacrifice.旧时一些有名的巫师经常以祭品祈求他们所供奉神灵的助佑。I thanked my parents for all their self-sacrifice on my behalf.我感...
P点和Q点分别表示该质点的两个位置.Points P and Q represent two positions of the particle.碰撞并不往往使质点减速.Collisions need not always act to slow particles down.我们可标记占据某个小领域的质点群.We label a group of particles occupying a small neighbourhood....