and then over here are peripheral signals

这里是外周信号
that happen outside the brain, mainly from the body's organs.

产生于大脑外部主要来自身体器官
Let's break this down and take it piece by piece

让我把它分步骤并逐一讲解
and show you how it might all fall together.

看看它们是如何协同作业的
Let's start with the brain.

从大脑开始
First of all, the brain and its subsequent physiological reaction

首先大脑和它的后续生理反应
is affected by external factors.

受外部因素的影响
The fact that you might seek out certain foods to soothe yourself

当人们因为压力而去找食物
when you're stressed

想让自己放松时
means that there are external things going on

也就意味着由外部产生的压力
that make certain foods more desirable to you

使得此刻一些食物
at some times than others,

比另一些更能满足你