英语语法分析

To observe the cellular changes of the pia vessels after chronic cerebral hypoperfusion.

目的观察慢性低脑灌注状态软脑膜血管组织细胞活性改变。

Such watershed infarctions can occur with relative or absolute hypoperfusion of the brain.

相对或绝对的脑低灌注都可能造成这种梗死。

As a result, the fetus may be experiencing hypoperfusion long before the mother manifests any signs.

结果，在母体表现出任何体征前胎儿可能长时间经历血流灌注不足。