It's a polymerized alkene, but the molecule itself is an alkane.

它是聚合烯烃， 但分子本身是烷烃。

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

如果它们有双键，我们称它们为烯烃，而那些有三键的是炔烃。

They can be alkanes or alkenes, sometimes, even rarely, alkynes.

它们可以是烷烃或烯烃，有时甚至很少是炔烃。

All the other naming rules apply to alkenes and alkynes too.

所有其他命名规则也适用于烯烃和炔烃。

Now, the bonds in alkenes have a few tricks up their sleeves.

现在，烯烃中的键有一些秘密。

There's only one letter changing here: A in alkanes changes to E for alkenes and then to Y for alkynes.

这里只有一个字母发生变化：烷烃中的 A 变为烯烃中的 E，然后变为炔烃中的 Y。

Well we know that they're unsaturated alkenes because saturated fats don't have double bonds, and thus, can't have cis- and trans- isomers.

我们知道它们是不饱和烯烃， 因为饱和脂肪没有双键，因此不会有顺式和反式异构体。

Alkenes can be made into alkanes and alkynes can become either alkenes or alkanes depending on how many atoms are added.

烯烃可以变成烷烃，炔烃可以变成烯烃或烷烃，具体取决于添加的原子数。

You also learned a little bit about cis-trans isomerism and learned a few important reactions of alkenes and alkynes such as hydrogenation, halogenation, and polymerization.

您还了解了一些顺反异构现象，并了解了烯烃和炔烃的一些重要反应，例如氢化、卤化和聚合。

So three words representing three different groups of organic compounds: alkanes for all single bonds, alkenes if they contain double bonds, and alkynes if they contain one or more triple bonds.

所以三个词代表三组不同的有机化合物：所有单键的烷烃，含有双键的烯烃，含有一个或多个三键的炔烃。