双语例句

1. This is behavior only along the x axis and this is a behavior only along the y axis and this is a behavior only along the z axis and the three together make up the actual motion of that particle.

它的运动只沿x轴方向,这个运动只沿y轴,而这个只沿z轴,3个运动组合起来,才是粒子的实际运动。