So, if we look on the periodic table, comparing, for example, s to o, if we have s it's below o, what happens to ionization energy as we go down a table?

那么，如果我们看周期表上，比较，比如，硫和氧，硫在氧下面，当我们沿着表向下看的时候,电离能是怎么变化的？

麻省理工公开课 - 化学原理课程节选

And I suggest a scale that people might use in order to decide how much is enough.

我也建议了一种捐款标准表,来帮助人们决定捐多少钱比较合适。

普林斯顿公开课 - 人性课程节选