We'll talk about that as we go through the lecture today.

今天的讲座说的就是这些材料
One of the applications I've already talked about last week

上周我提到过的高分子材料的一种应用
was making tubes of polymers,

就是制造管道
tubes of polymers that can be used

高分子管道
to replace the conduits through which blood flow.

可以用来替代血管
This slide shows you some examples of arterial grafts,

这张幻灯片就是一个动脉补片的例子
so synthetic materials that are used to replace a segment,

人工材料可以用来代替一段血管
let's say of the aorta.

比如主动脉
This might be needed because

一些病人在创伤情况下比如遇到车祸
the patient has had some kind of trauma

他们的主动脉因为创伤而破裂出血
where their aorta has become ruptured like in a car accident, for example.

这时就需要用到人工动脉
It's deep within your body

主动脉位于你体内深部