Okay, today we're going to continue to talk about cell communication.

好的今天我们继续谈谈细胞通讯
I'm going to talk about - take sort of the general concepts that

我将要谈到几个基本的概念
we talked about last time

我上节课已经讲过一些了
and talk about how they apply in two physiological systems,

再讲讲这些概念在两个生理系统中的应用
the nervous system first and then the immune system.

首先是神经系统然后是免疫系统
This is a lead in to what we'll talk about next week.

顺便给下周要讲的内容起个头
We're going to start talking about vaccines

我们将会从
which is really sort of applied immunology:

属于应用免疫学范畴的疫苗问题讲起
trying to take immunological concepts

以便把免疫学上的概念
and put them into action or to engineer them in some way.

同实际应用或者某种工程学应用联系起来