as long as the anti-sense sequence is present.

有反义链的时候发挥作用
So this might be a longer lasting,

所以这似乎是一种持续时间更长
more permanent form of elimination of expression of a particular gene.

更长久地阻止某个特定基因表达的方法
I just wanted to introduce those concepts

我只是想简单介绍下这些概念
because you've read about them;

因为你们已经读过它了
we'll be talking more about RNA interference in particular

随着课程的深入
as we go on through the course.

我们将会讨论更多关于RNA干扰的内容
The rest of the time I want to talk about expression of genes,

剩下的时间里我想讲讲基因的表达
of new genes.

新基因的表达
Taking foreign genes,

将异源基因
genes that aren't naturally expressed or might not even exist

即那些在细胞中原本不表达或者
inside a cell and putting them there and putting them there in a way where they work,

根本不存在的基因转入细胞并让它们工作