So what do you do when you're a kid and you want 3 to count a little faster than 1 and 2 and 3 and 4 what is the simplest thing you do?

因此当你还是个孩子的时候,你想数得比1，2，3，4快一些3,最简单的方法是什么？

哈佛公开课 - 计算机科学课程节选

The thing that is very interesting that he finds is the difference, 4%, between the historical real return on stocks and the historical real return on bonds.

非常有趣的是,他发现历史实际股票收益，和历史实际债券收益之间,存在4%的差异。

耶鲁公开课 - 金融市场课程节选

When you add this whole thing up, -411kJ/mol it gives you a net of minus 411 kilojoules per mole or about 4 eV per ion pair.

当你全部加上时，得到净能量,或者是4eV每个离子对。

麻省理工公开课 - 固态化学导论课程节选