So if I tell you that the energy for single hydrogen atom is negative 13 12 kilojoules per mole.

如果我告诉大家单个氢原子的能量,是负的，1312，千焦每摩尔。

化学原理课程节选 : 麻省理工公开课

Do not come to your instructor and say, I've got a really good ticket but I'm leaving on the 13th.

不要去和你们的讲师说，我已经买好票了,但是我要在13号离开。

固态化学导论课程节选 : 麻省理工公开课

And here, too, it's just a little baby program in that I'm hardcoding the expression 17 divided by 13.

然后这里，这只是一个子程序,在那里面我硬编码了表达式“17除以13“

计算机科学课程节选 : 哈佛公开课