The scientists on Antarctica know better than anyone about the effects of pollution and human behavior on this important treasure of a continent.

VOA: special.2009.06.03

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

It's not just behavior that is important for understanding as well as improving life.

不能只靠行为观察，改善人生。

哈佛公开课 - 幸福课课程节选