英语语法分析

He found that rats that exercise on a treadmill have raised levels of brain-derived neurotrophic factor coursing through their brains.

他发现，在跑步机上锻炼的老鼠，其大脑中流过的脑源性神经营养因子水平有所提高。

It has powerful neurotrophic and neuroprotective activity.

它具有强大的营养和保护神经作用。

Brain derived neurotrophic factor (BDNF) is, as its name implies, produced in the brain.

源于脑部的神经营养因子(BDNF)，如同它的名字，产生自脑部。