Yes, when most people think about cars and fuel, they think about all the carbon dioxide that's produced, but they don't realise that that wasn't always the case.

是的，当大多数人想到汽车和燃料时，他们想到的都是其产生的二氧化碳，但他们没有意识到情况并非总是如此。

youdao

So in one case, we could actually put carbon in the middle, in one place, we could put sulfur in the middle, and in one case we could put nitrogen.

那么有一种情况是，我们把碳放在中间，还有一种情况是，把硫放在中间，另外一种情况是把氮放在中间。

youdao

So we based the carbon calculation on industry averages, in this case the airline industry.

因此，我们基于行业平均水平进行碳排放计算，在这个例子中为航空业。

youdao

So let's take the case of acetylene where we have two carbon atoms that are going to be triple bonded to each other, each are bonded to a carbon and then to one hydrogen.

让我们来看一看乙炔的例子,我们有两个碳原子,成三键，每个碳和一个碳一个氢相连。

麻省理工公开课 - 化学原理课程节选

As we see a little bit later, I could talk about the carbon-hydrogen bond in methane where there is a plurality of bonds. In this case, there is only the one bond but I just want to get the formulas.

因为我们后来看到一点点，我能讨论甲烷中的碳氢共价键,那有许多共价键，这种情况下，这只有一条共价键,但我想得到氟。

麻省理工公开课 - 固态化学导论课程节选

So in one case, we could actually put carbon in the middle, in one place, we could put sulfur in the middle, and in one case we could put nitrogen.

那么有一种情况是，我们把碳放在中间，还有一种情况是，把硫放在中间，另外一种情况是把氮放在中间。

麻省理工公开课 - 化学原理课程节选

It "pumps" it into the water via the compression and expansion of a fluid--in this case, carbon dioxide--as in a typical air conditioner.

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