I'm sure you have examples of that;

我相信你们也有这样的例子
topical ointments like antibacterial cream

类似抗菌药膏的局部药膏
you might put on something if you have a cut

如果你有切伤而想免于被感染
and you want to keep it from being infected.

这时你会把药物涂在伤口上
You don't take antibiotics by mouth and have them all over your body,

你不会口服抗生素使之充满全身
you put a little topical treatment on the site

而是涂在特定的位点
because you're targeting the drug to the site that you need.

因为你知道哪里需要它
On the next slide there's some other more

在下一章幻灯片上有
uncommon modes of administration,

一些罕见的药物摄入模式
rectal, transdermal, vaginal.

像通过直肠的经皮的阴道的
We won't talk very much about those,

但是我们将不会在这些上谈太多
and next week we'll talk about special kinds of drug delivery systems

下周我们将讲特殊种类的药物输送系统