is made possible by a protein called RNA polymerase.

RNA聚合酶的蛋白质催化下进行的
It allows RNA to be made from a DNA template.

它催化从DNA模板生成RNA的过程
It's not as simple as DNA going to RNA going to protein,

基因表达不是简单的从DNA到RNA
because proteins need to be present

再到蛋白质因为整个过程需要
in order to make these things happen as well.

不同酶的催化作用
Let's talk about DNA synthesis for a minute.

下面简要介绍一下DNA的合成
When a cell divides in your body,

当体内的细胞分裂的时候
when cells of your intestine divide, when cells of your skin divide,

比如肠道细胞分裂皮肤细胞分裂
and they're doing this all the time,

分裂过程在持续不断的进行
in order for a cell to divide and form two daughter cells--

一个细胞将分裂产生两个子代细胞
we'll talk about that process

我们将在下周详细讨论分裂过程
next week--but in order for that to happen

在分裂过程中