Are you sure he's lying?

你确定他在说谎吗

He's trained to lie without betraying himself.

他接受过说谎训练 不会露出马脚

even though we can't hear it,

即使我们听不见它

The low frequency waves cause vibrations

低频的声波引起我们身体

but what we're seeing here isn't the usual psychological block

但情况表明这不是普通心理障碍

How can you be sure of that?

你怎么知道

but neither reabsorbed nor secreted.

但既不重吸收也不排泌

sort of deep inside your body, so you can

生理功能 因此你能

Let's start with the brain.

从大脑开始

is affected by external factors.

受外部因素的影响

we talked about last time

我上节课已经讲过一些了

the nervous system first and then the immune system.

首先是神经系统然后是免疫系统