But you can also look at it qualitatively, so, if you think about the force between the electron and the proton, you could just qualitatively think about what's happening.

但你也可以定性的来研究这个问题，所以如果你们考虑电子,和质子之间的作用力,你可以定性的来想。

麻省理工公开课 - 化学原理课程节选

So once you look at Star Festival then you can think about the questions you have to answer and then question maybe the same thing I ask myself: who am I? While maybe some other questions.

所以当你看“七夕“的时候,你可以考虑你必须要回答的问题,这个问题有可能是我问自己的那个同样的问题：,我是谁？或者其它的问题。

麻省理工公开课 - 媒体、教育、市场课程节选

So, therefore, we can rewrite our equation in two ways. One is just talking about it in terms only of energy where our kinetic energy here is going to be equal to the total energy going in -- the energy initial minus this energy of the work function here.

所以我们可以把方程,写成两种形式，一个是,只考虑能量，动能等于总的,入射能量-初始能量减去,功函数的能量，我们如果想解决,比方说，我们想知道。

麻省理工公开课 - 化学原理课程节选