They can click on the particle and move it around in this 3D space.

学生可以在物质上点一下,然后让它动起来,在这个3D空间里。

麻省理工公开课 - 媒体、教育、市场课程节选

What we had just done a clicker question on is discussing light as a particle and the photoelectric effect, so we're going to finish up with a few points about the photoelectric effect today.

我们刚才做得课堂表决器那个问题,是讨论光作为一个粒子以及光电效应，所以今天我们将以一些,关于光电效应的观点作为结束。

麻省理工公开课 - 化学原理课程节选

So, if instead you put your particle somewhere down here on the electric field, or on the wave, the electric field will now be in the other direction so your particle will be pushed the other way.

还有方向，所以如果,你把粒子放在这下面，电场的方向相反,粒子会朝另一个方向运动。

麻省理工公开课 - 化学原理课程节选

The first, which I just stated, is that the deflection of that negative particle was just far and away more extreme, much, much larger than that of the positive particle. The other assumption that he made here is that the charge on the two particles was equal.

为了这么做，他又做了更多的观察,首先，像我之前已经说了，测到的负电粒子,偏转要远远,大于正电粒子,另外一个他做了一个假设。

麻省理工公开课 - 化学原理课程节选