But, you can see, this is right out of his notebook, and you can see he's arranged the atoms by row.

但是，你能看到，这是他的记录本的右边，你能看到他按行对原子的排布。

麻省理工公开课 - 固态化学导论课程节选

You could say, I could have zero chickens and 20 pigs, does that work? I've got one chicken and nineteen pigs, does that work?

为什么简单列举出所有可能的情况,再一个来检验？你可能会说,我可以有0只鸡和20只猪，这能行吗？

麻省理工公开课 - 计算机科学及编程导论课程节选