Adenine will always bind with thymine and cytosine with guanine.

腺嘌呤总是与胸腺嘧啶结合，胞嘧啶与鸟嘌呤结合。

This attaches methyl groups (a carbon atom and three hydrogens) to either adenine or cytosine, two of the four chemical bases that form the alphabet of DNA, depending on the gene involved.

该作用可以让甲（由一个碳原子和三个氢原子组成）附着于腺嘌呤或胞嘧啶上——组成DNA序列四种主化学成分中两种，底附着是哪种取决于涉及因种类。

Never in your life will you have to remind a cell to keep an eye on its adenosine triphosphate levels or to find a place for the extra squirt of folic acid that's just unexpectedly turned up.

在你一生中，你永远没有必要提醒任何一个细胞，要随时注意其腺嘌呤核苷三磷酸盐情况，或是找存放不期然间出现叶酸地方。

Nucleotides of DNA are made out of a sugar deoxyribose, a phosphate, and one of the four nuclear bases: adenine, cytosine, guanine, and thymine or A, C, G, T for short.

DNA核苷酸由脱氧核糖、磷酸以及四个核碱之一组成，分别是腺嘌呤、胞嘧啶、鸟嘌呤与胸腺嘧啶，或简称A、C、G、T。

The series of reactions that generate more ATP in muscles do produce extra protons, which lowers the pH in your muscles.

肌肉中形成更腺嘌呤核苷三磷酸系列反应确实产生了额外质子，这会降低肌肉中酸碱值。

But for the remaining .1%, one person might have an adenine where another person has a guanine.

但对于剩下0.1%，一个人可能有腺嘌呤而另一个人有鸟嘌呤。

That “form” is called ATP, if you're familiar with that.

如果你熟悉这种形式话，名字叫做 ATP（腺嘌呤核苷三磷酸）。

Nucleotides of DNA are made up of a sugar - deoxyribose, a phosphate, and one of the four nucleobases - adenine, cytosine, guanine, and thymine - or A, C, G, T for short.

DNA核苷酸由一分子单糖-脱氧核糖、一分子磷酸与四种核碱之一腺嘌呤（A）、胞嘧啶（C）、鸟嘌呤（G）或胸腺嘧啶（T）组成。

It was known that DNA had four chemical components - called adenine, guanine, cytosine, and thiamine - and that these paired up in particular ways.

当时已经知道，DNA含有4种化学成分——腺嘌呤、鸟嘌呤、胞嘧啶和胸腺嘧啶——这4种成分总是以特殊配对方式排列。

The Nitrogenous bases are of four different types: Adenine, Guanine, Cytosine and Thymine.

含氮碱有四种不同类型：腺嘌呤、鸟嘌呤、胞嘧啶和胸腺嘧啶。

So the caffeine doesn't even need to compete with the adenosine to fit into those receptors.

所以咖啡因不用和腺嘌呤核苷竞争受体。

Then it starts to make more, using a bunch of different chemical reactions.

然后身体利用很不同化学反应开始制造更腺嘌呤核苷三磷酸。

The bases - the letters of the genetic alphabet - consist of the four nucleotides mentioned a page or two back: adenine, thiamine, guanine, and cytosine.

碱——因子母表中字母——由前面我们提腺嘌呤、鸟嘌呤、胞嘧吟和胸腺嘧啶4种核苷酸组成。

So there's a molecule inside your brain called adenosine and it plugs into little receptors inside your brain and makes you feel tired.

大脑中有一个分子物叫做腺嘌呤核苷，这个物质会和大脑里受体结合，让人困意绵绵。

When you exercise, your body uses up its main source of energy, ATP, within a few seconds.

当你锻炼时候，你身体在几秒钟内便耗尽了其能量主要来源，即腺嘌呤核苷三磷酸。

Guanine always pairs with cytosine and adenine always pairs with thymine.

鸟嘌呤总是与胞嘧啶配对，腺嘌呤总是与胸腺嘧啶配对。

We're storing energy as N-A-D-H NADH and F-A-D-H-2 or FADH2.

我们将能量储存为NADH（烟酰胺腺嘌呤二核苷酸）和FADH2（黄素腺嘌呤二核苷酸）。

NAD, short for nicotinamide adenine dinucleotide, is a coenzyme that occurs naturally in human cells.

NAD， 即烟酰胺腺嘌呤二核苷酸缩写，是一种天然存在于人体细胞中辅酶。

So you want to provide something that is going to increase NAD.

因此，你希望提供一种能够增加NAD（烟酰胺腺嘌呤二核苷酸）水平东西。

So again, you might have a slight dose issue, but at the end of the day, you're giving NR, NR is freely taken up into cells, it turns into NAD.

因此，尽管可能存在轻微剂量问题，但归根结底， 你提供是NR（烟酰胺核苷），NR能够自由进入细胞， 并转化为NAD（烟酰胺腺嘌呤二核苷酸）。