One big thing exercise does is it raises your levels of brain derived neurotrophic factor — BDNF.

锻炼的一的作用就是，它能提高你源性神经营养因子的水平。

Protect yourself and your brain from stress, you release this protein known as BDNF, brain derived neurotrophic factor.

为在这种压力下保护你自己及你的, 你会释放出这种被称为BDNF的蛋白, 衍生出的神经营养因子。

It does this by promoting the production of a protein called brain-derived neurotrophic factor (or BDNF) , which in turn enables and improves a process called long-term potentiation.

这是通过促进一种叫做源性神经营养因子(BDNF)的蛋白的产生来实现的，而这种蛋白的产生反过来又促进一种叫做长期增强的过程。