"We need new gloves,books. We need teachers." Thompson's staff of 13 is now down to just three - all working for free.

VOA: standard.2010.04.29

Here just two, so we changed the number of moles of gas by three. All right, how much did it matter, right?

所以我们将气体的摩尔数,改变了3摩尔，好，它会起多大作用？

麻省理工公开课 - 热力学与动力学课程节选

We have to add it all up so it's not just numbers, three against one; it's also all of those people at home.

得把这些加起来考虑,所以就不只是这个数字，三比一;,还要加上这三人的家人。

耶鲁公开课 - 公正课程节选

All right, so that's s p 3 hybridization, but those aren't the only type of hybrid orbitals that we can form. Let's take a look at what happens if instead of combining all four orbitals, we just combine three of those orbitals, and what we'll end up with is s p 2 hybridization.

好了，这是sp3杂化，但这并不是我们可以,形成的唯一类型的杂化轨道,让我们来看看，不是四个轨道结合，我们仅仅结合3个轨道。

麻省理工公开课 - 化学原理课程节选