Well,this was designed as a device

我们设计出这种给药装置
that you would give to neurosurgeons so that

以便神经外科医生
they could improve therapy of brain tumors.

改善对脑肿瘤的治疗
You probably know that tumors of the brain are among the most difficult to treat.

你们可能都知道脑肿瘤是很难治疗的
If you get a tumor in the central nervous system

如果在中枢神经系统长了肿瘤
they have very poor prognosis or life expectancy.

患者的预后就很差存活时间也很短
People that get aggressive brain tumors

患有恶性脑肿瘤的患者
die within a very short time after it's diagnosed, unfortunately.

在确诊后的短时间内就会死亡真是不幸
That situation hasn't changed much over the last 100 years.

这种情况在过去的一百年中并未有所改善
One of the reasons is what we mentioned earlier,

原因之一是我们以前说过的
that the brain is protected from chemical entry by the blood brain barrier.

血脑屏障会阻止化学物质进入大脑
Capillaries in your brain don't allow molecules to move across them.

大脑中的毛细血管会阻止分子通过