DNA is the letters that make up genes, A, T, C, and G.

DNA 是组成基因 A，T，C 和 G 的字母。

They can be represented by the letter codes A, T, C and G.

这些分子分别用字母A、T、C和G来代表。

The code comes out to be a fairly simple alphabet, four letters: A, T, C and G.

这个遗传密码由简单的字母表组成，四个字母，A，T，C和G （碱基）。

There are four bases: A, T, C, and G, and the bases pair up as AT and CG.

A、T、C 和 G，碱基配对为 AT 和 CG。

But just remember, A, T, C, and G, and it is best to remember in this order: AT, CG.

但要记住 A、T、C 和 G，最好按这个顺序记忆：AT、CG。

So DNA is a set of instructions for how our bodies work written using a chemical code of four letters – A, T, C, G. But sometimes the code contains mistakes.

那么，DNA就是A、T、C、G四种碱基编码组成的指示机体运转的遗传指令。但是有时候这些编码中会出现错误。

In the language of A, T, C, and G, we find the story of life itself, a story that we are just beginning to decipher.

在A、T、C、G的语言中，我们找到了生命本身的故事，一个我们刚刚开始解读的故事。

The ingredients are the DNA that we wish to multiply, an enzyme called Taq polymerase, specific primers that bind to the DNA, and a mixture of free nucleotides - A, T, C and G.

我们想要扩增的DNA、一种叫做Taq聚合酶的酶、与DNA结合的特异性引物以及游离核苷酸A、T、C和G的混合物。

They had uncovered the very code of life, a language written in a four-letter alphabet: A, T, C, and G. The ensuing decades brought a cascade of revelations.

他们发现了生命的密码，一种用四个字母字母书写的语言：A、T、C 和 G。接下来的几十年带来了一系列的启示。

It requires a thermal cycler, filled with the DNA sample to be multiplied, thermostable Taq polymerase, primers with which we select what gets multiplied, and free nucleotides of all 4 types - A, T, C and G.

它需要往热循环仪中加入用于扩增的DNA样本、耐热的Taq聚合酶、扩增时选用的引物，以及所有4种类型的游离核苷酸A、T、C和G。