And I always just go right back to the neurochemistry.

我总是直接回到神经化学。

Together all this neurochemistry sends one clear message to our bodies: when it's dark, it's time to go to bed.

天黑了，该睡觉了。

And I mean, I'm constantly amazed at the cleverness of plants and their mastery of neurochemistry to get us to do what they need us to do.

我的意思是，我一直对植物的聪明和它们对神经化学的掌握感到惊讶，它们能让我们做它们需要我们做的事情。

After looking at a bunch of data, both with animals and humans, researchers said that there are substantial parallels between sugar and drugs of abuse, from both a behavioral standpoint and one of brain neurochemistry.

在查看了一系列动物和人类数据后，研究人员表示，从行为角度和大脑神经化学角度来看，糖和滥用药物之间存在大量相似之处。