RNA has a base, uracil, or U, whereas DNA has the base thymine or T.

RNA 基是尿嘧啶（U），而 DNA 基是胸腺嘧啶（T）。

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。

There are four bases: adenosine, thymine, cytosin, and guanine.

腺苷、胸腺嘧啶、胞嘧啶和鸟嘌呤。

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

含氮基有种不同类型：腺嘌呤、鸟嘌呤、胞嘧啶和胸腺嘧啶。

Silver sulfadiazine is still used to dress burns.

磺胺嘧啶银仍用于包扎烧伤。

Set me up for a high volume irrigation and grab me some silvadene.

准备大量冲洗和磺胺嘧啶银。

Purine position 1 to pyrimidine position 1, purine position 6 to pyrimidine position 6.

嘌呤位置 1 到嘧啶位置 1，嘌呤位置 6 到嘧啶位置 6。

To understand where the uric acid comes from, let's start with purines, which, together with pyrimidines, are nature's most common nitrogen-containing heterocycles.

为了说明尿而来，让我们先来了解嘌呤和嘧啶，它们都是自然界中最常见含氮杂环。

DNA is made of four organic bases: adenine, guanine, cytosine, and thymine, or A, G, C, and T.

DNA 由种有机基组成：腺嘌呤、鸟嘌呤、胞嘧啶和胸腺嘧啶，即 A、G、C 和 T。

See, DNA is made up of four different building blocks called " bases" : adenine, cytosine, guanine, and thymine.

看，DNA 由种称为“基”不同构件组成：腺嘌呤、胞嘧啶、鸟嘌呤和胸腺嘧啶。

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

基——基因子母表中字母——由前面我们提到腺嘌呤、鸟嘌呤、胞嘧吟和胸腺嘧啶4种核苷组成。

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核苷由脱氧核糖、磷以及个核基之一组成，分别是腺嘌呤、胞嘧啶、鸟嘌呤与胸腺嘧啶，或简称A、C、G、T。

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.

该作用可以让甲基（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序列种主化学成分中两种，到底附着是哪种取决于涉及到基因种类。

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核苷由一分子单糖-脱氧核糖、一分子磷与种核基之一腺嘌呤（A）、胞嘧啶（C）、鸟嘌呤（G）或胸腺嘧啶（T）组成。