In August,eighteen sixty-four, Lincoln wrote:"For some days past, it seems that this administration probably will not be re-elected.

VOA: special.2009.12.10

So, for example, down here I wrote that it was n 2 and that it was h 2, but when I re-wrote the molecules up here, you saw that it's an h h single bond where it's a nitrogen-nitrogen triple bond.

比如，在这下面我写的是氮分子2,而这个是氢分子，但我在上面把这些分子的形式改写了，大家可以看到,这是一个氢与氢之间的单键，含一个氮与氮之间的三键。

麻省理工公开课 - 化学原理课程节选

In nineteen eighty-six, Doctor Seuss wrote "You're Only Old Once."

VOA: special.2010.05.02