You can generally classify skeletal muscles into four functional groups depending on the movement being performed.

你通常可以根据正在执行的运动将骨骼肌分为四个功能组。

When an engineer works on a project, they bring the expertise of their whole functional group with them.

当一个工程师致力于一个项目时，他们有着整个功能性组织的专长。

Moreover, both the less active and the more active gene types came from a small number of functional groups.

而且，无论是活力较高的基因还是活力较低的基因都来自少数功能群。

But there's a downside of that though, isn't there? I mean, organizing a company into functional groups is not all positive.

但是也有不利的一面，不是吗？我是说把公司组织成功能性群组并不是没有负面影响的。

Now, acetone is just a name of that one chemical, not the functional group itself.

现在，丙酮只是一种化学物质的名称，而不是官能团本身。

Well the same thing goes for the ethene functional group, which is called a vinyl group.

同样的事情也适用于乙烯官能团， 它被称为乙烯基。

By functional group I mean an alcohol group or ketone group or aldehyde group or acid group.

官能团是指醇基或酮基或醛基或酸基。

Two important notes here, if the parent functional group is on carbon one we just leave the number off.

这里有两个重要的注意事项， 如果父官能团在碳一上， 我们就把数字去掉。

And of course, there are literally dozens of other named functional groups that will change the suffix.

当然， 还有许多其他命名的功能组会更改后缀。

But first, what is a functional group?

但首先，什么是功能组？

The first and most familiar oxygen-based functional group is the alcohol, a terminal " -OH" .

第一个也是最熟悉的氧基官能团是醇，一个末端“-OH”。

So yeah, when we have a carbonyl in the middle of a carbon chain, that is a ketone functional group.

所以是的，当我们在碳链中间有一个羰基时， 那就是酮官能团。

There can be functional groups inside of functional groups.

功能组内部可以有功能组。

Any side chains or functional groups sticking off the side have to be identified and named.

必须识别和命名任何从侧面伸出的侧链或官能团。

In fact, if you look at all these oxygen based functional groups you'll see that they're all very closely related.

事实上，如果你观察所有这些氧基官能团， 你会发现它们之间的关系非常密切。

Using these two extra elements, we're going to talk about seven exciting and different functional groups.

使用这两个额外的元素，我们将讨论七个令人兴奋的不同功能组。

And those are the seven functional groups that we're going to talk about.

这些就是我们要讨论的七个功能组。

Usually, these are pretty easy to remember because they come straight off the name of the functional group.

通常，这些很容易记住， 因为它们直接来自功能组的名称。

When working with functional groups, each one adds a particular suffix to the end of the name of a compound.

使用官能团时， 每个官能团都会在化合物名称的末尾添加一个特定的后缀。

Organic compounds that include these functional groups have various wonderful names: wood alcohol, cinnamaldehyde, and cadaverine.

包含这些官能团的有机化合物有各种美妙的名字：木醇、肉桂醛和尸胺。