But if I see you through the glass, the object is going on some trajectory, which has got both up and down and horizontal motion.

但是如果我透过窗户看到你,这个物体沿着某个轨迹运动,既有上下,也有水平方向的运动

耶鲁公开课 - 基础物理课程节选

I think a lot of us, we do what we can in this lifetime, hoping that we're are part of a long trajectory of a moral arch toward justice What would like to see in America in 20 years?

我认为我们之中很多人在一生中会竭力奋斗，希望我们能够沿着道德，正义的,的轨迹发展,您如何构想美国20年后的情景呢？

普林斯顿公开课 - 人性课程节选