"I want a job because I don't want to get in any trouble, I want to stay away from the streets, keep my head on my shoulders, stay on the right path The director of the program is Salvatore Mastroeni, a former principal of a high school.

VOA: special.2009.08.20

But when we're thinking about actual wave behavior of electrons, it's just important to keep in the back of our head that some areas have positive amplitude and some have negative.

电子的波动行为时,我们，要记住,某些地方是正的,某些地方是负的,当我们讲到。

麻省理工公开课 - 化学原理课程节选