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....
Sudan even threat-ened to mobilize in response to the ultima-tums.作为对最后通牒的回应，苏丹甚至威胁说要动员军队。No sentence could leave her desk until all the tum - te - tums were right.任何冗赘的字眼都不可能幸免存留下来.Love tums into a teardrop and remains ...
He lost last year's final to fellow countryman Michael Stich.他在去年的决赛中输给了自己的同胞迈克尔·施蒂希。He had the red face of a countryman.他有着乡下人的红脸庞。Sampras looks set to play his fellow countryman Agassi in the final.桑普拉斯好像注定要在决赛中遇上...