These are of two varieties, known as single and double bonds.

化学有两种，单和。

The molecule itself is a diterpene, a kind of carbon-and-hydrogen molecule with lots of double bonds.

这个分子本萜，一种有很多的碳氢分子。

Unsaturated fats, on the other hand, contain double bonds that create an irregular kink in their structure.

相反，非饱和以以不规则地连接在一起。

Corn oil, for example, is made up of lipids with lots of double bonds, also known as polyunsaturated fats.

例如，玉米油由许多的脂类组的，这类质也叫作多元不饱和脂肪。

The carbons double bond with each other so that fewer hydrogen can fit and we call this unsaturated fat.

每个碳原子之间都有连接，这样氢很难嵌入碳原子之间。我们称这种脂肪为不饱和脂肪。

How, for example, could you imagine sp3 orbitals forming a double bond?

例如， 您如何想象 sp3 轨道形？

And the reason that these are bent is because they have a double bond.

这些分子之所以弯曲，因为它们含有一个。

They have this chemical structure that involves having double bonds in it.

它们具有这种化学结构，其中包含。

And so we have four electrons in this double bond between the carbon and the oxygen.

所以我们在这个碳和氧之间的中有四个电子。

So we have a polarized double bond situation here.

所以我们这里有一个极化的情况。

OK, so the ones you don't want, the ones with the double bonds, the wiggly ones.

好的，那些你不想要的，带有的，弯曲的那些。

If you get a double bond right here, that's going to cause this to actually bend on itself.

如果在这里形一个，那会导致整个结构向内弯曲。

That's your nice symmetrical double bond that you see in molecules like ethylene.

这你在乙烯等分子中看到的漂亮的对称。

So the logic goes something like, well, you have these multiple double bonds and so they can be oxidized.

因此，逻辑这样的，嗯，你有这些多个， 所以它们可以被氧化。

If they've got a double bond, we call them alkenes, and those with triple bonds are alkynes.

如果它们含有，我们称它们为烯烃，而含有三的则称为炔烃。

Those rings and double bonds don't give PET much flexibility, so the polymers tend to pack closely together, and are harder to melt.

那些环和无法给 PET 太多的灵活性，所以聚合会被紧密地聚合在一起，更难被熔化。

One of the 2 bonds in the double bond has sp2 orbitals merging together nicely in line with the nuclei.

中的 2 个之一具有 sp2 轨道， 与原子核很好地合并在一起。

These occur when an atom is either triple bonded to another atom or is double bonded to 2 atoms.

当一个原子与另一个原子形三或与 2 个原子形时， 就会发生这种情况。

But toss a double bond in here or there, and the situation gets a lot more complicated, and interesting, and delicious.

但在这些分子中加入一个，情况就会变得复杂得多， 也有趣得多， 味道也会更美味。

You recognize the -alkane ending there, so there must be no double bonds, right?

你认出了 -alkane 在那里结束， 所以一定没有， 对吧？