The researchers suspect that the newborn c-section babies might be picking up their generic bacteria mix from the air - one way bacteria gets on our skin.

VOA: standard.2010.06.30

You know, you mix acid and base together and the thing heats up like crazy, right.

你知道，当你把酸和碱混合起来时,这东西会像疯了一样地变热。

麻省理工公开课 - 热力学与动力学课程节选

And, if I take and I mix the 2s and the 2p's, and by the Hund rule, if I can come up with four, what have I got?

由洪特规则，如果我把2S和2P轨道混合，如果我们能提供4个轨道，我们已经有什么了？

麻省理工公开课 - 固态化学导论课程节选