He learned to get light to go far enough down a glass fiber to pass on signals.

VOA: special.2009.12.08

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

You take a glass of ice water and set it down.

这是液态；

麻省理工公开课 - 热力学与动力学课程节选