那么让我们以氰化氢为第一个例子。

So let's hydrogen cyanide as our first example.

youdao

这看起来整洁了不少,如果我们把氰化氢的路易斯结构画成这样的话，这样我们就有氢与碳之间的单键和碳与氮之间三键，然后还有一对孤对电子在氮这里。

So it looks a lot less messy if we just draw our Lewis structure like this for h c n, where we have h bonded to c triple bonded to n, and then a lone pair on the nitrogen there.

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斯皮策探测到在和我们太阳类似的黄色恒星周围的尘埃盘中有一种原始生命分子-氰化氢，但在更冷的、质量更少的微红色恒星周围却没有。

Spitzer detected a prebiotic molecule, called hydrogen cyanide, in the disks around yellow stars like our sun, but found none around cooler, less massive, reddish stars.

youdao

So, why don't you go ahead and tell me, keeping that in mind, which atom in terms of h c or n would you expect to be in the center of hydrogen cyanide?

那么，请大家来告诉我，并且记住它，你认为氢，碳和氮中哪个原子,应该在氰化氢的中间呢？

麻省理工公开课 - 化学原理课程节选

And if you put this in the well-ventilated area, if you prepare this outside, the h c n gas will actually be released into the air, so you're safe, you can eat it later.

而如果你把它们放在通风良好的地方，在室外处理，那么氰化氢气体,将会被释放到空气中，这样你就安全了，过后就可以吃了。

麻省理工公开课 - 化学原理课程节选

The other thing is that we can re-write our h c n in terms of bonds.

还有一件事是我们可以用键的形式来表示氰化氢。

麻省理工公开课 - 化学原理课程节选