The 312 particles are held together in a nucleus by a force that involves the continuous exchange of meson-like particles called memo-ons.

12个粒子汇合与一个原子核里,连续不断的,叫做memo-ons的介子的交换给它作用力。

麻省理工公开课 - 固态化学导论课程节选

I'm simply saying swap X with Y, but this 2 won't work, because where are X and Y defined?

我只简单地说交换X和Y，但是这两行不起作用，因为X和Y是在哪里定义的呢？

哈佛公开课 - 计算机科学课程节选