But it's a bit cumbersome to constantly be asking: Might I still exist after the death of my body?
但是老是去问"我有没有可能,在死后依然存在"会让人觉得很厌烦
The nervous system, the endocrine system which we'll start talking about a little bit today is the system that's responsible for sending signals back and forth between tissues of your body.
还有神经系统,和我们今天将要提到的内分泌系统,内分泌系统主要负责,在体内各组织之间传递信号
They're used by the body for pretty immediate energy where fat is a little bit more long-term energy, and there are many types of sugars-- and these are things that you've heard-- glucose and sucrose being the most common things that you can consume in ordinary foods, and then lactose of course, from milk.
碳水化合物被身体当做是直接能源,而脂肪则更像是一种长期能量,糖的种类有很多,这些类型你们已经听说过,葡萄糖和蔗糖是最常见的形态,你们可以在一般的食物中获取,乳糖,显然来自于乳类
The other thing that I want to do today is try to tie this discussion on vaccines a little bit more closely with what we talked about last week, in terms of what happens inside your body when you receive a vaccine or when you're exposed to an antigen, and how the immune system actually responds to that.
还有就是,我希望可以,把今天关于疫苗的讨论,与我们上周讲过的内容,结合得更紧密一些,当接种疫苗,或者是接触抗原时,人体将会发生怎样的变化,以及免疫系统对疫苗产生何种应答
Here's another picture of it here, showing it in a little bit more detail, that you have lots of DNA in each of the cells in your body but you're not using all that DNA at any one time.
这里有一张更加详细的图片,来说明这一点,人体内每个细胞中都含有大量DNA,但并不是所有的DNA都会同时发挥作用
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