Adenine will always bind with thymine and cytosine with guanine.

嘌呤总是与嘧啶结合，胞嘧啶与鸟嘌呤结合。

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

、嘧啶、胞嘧啶和鸟嘌呤。

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

RNA 的碱基是尿嘧啶（U），而 DNA 的碱基是嘧啶（T）。

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

含氮碱基有四种不同的型：嘌呤、鸟嘌呤、胞嘧啶和嘧啶。

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。

The rules of base pairing dictate that adenine always pairs with thymine, and cytosine always pairs with guanine.

碱基配对定嘌呤总是与嘧啶配对，胞嘧啶总是与鸟嘌呤配对。

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

看，DNA 由四种称为“碱基”的不同构件组成：嘌呤、胞嘧啶、鸟嘌呤和嘧啶。

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

DNA 由四种有机碱基组成：嘌呤、鸟嘌呤、胞嘧啶和嘧啶，即 A、G、C 和 T。

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.

为了说明尿酸从何而来，让我们先来了解嘌呤和嘧啶，它们都是自然界中最常见的含氮杂环。

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——嘌呤、鸟嘌呤、胞嘧啶和嘧啶——这4种成分总是以特殊的配对方式排列。

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

碱基——基因子母表中的字母——由前面我们提到的嘌呤、鸟嘌呤、胞嘧吟和嘧啶4种核酸组成。

All living organisms are built from DNA. It is made from four blocks of chemicals called adenine (A), cytosine (C), guanine (G) and thymine (T).

所有生物体都是由 DNA 构成的。它由四种化学物质组成，称为嘌呤 (A)、胞嘧啶 (C)、鸟嘌呤 (G) 和嘧啶 (T)。

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的核酸由脱氧核糖、磷酸以及四个核碱基之一组成，分别是嘌呤、胞嘧啶、鸟嘌呤与嘧啶，或简称A、C、G、T。

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的核酸由一分子单糖-脱氧核糖、一分子磷酸与四种核碱基之一的嘌呤（A）、胞嘧啶（C）、鸟嘌呤（G）或嘧啶（T）组成。

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）附着于嘌呤或胞嘧啶上——组成DNA序列的四种主化学成分中的两种，到底附着的是哪种取决于涉及到的基因种。

It's composed of long strands of nucleotides, each made up of a sugar molecule, a phosphate group, and one of four nitrogen bases: adenine (A), thymine (T), cytosine (C), or guanine (G).

它由长链核酸组成，每条核酸链由一个糖分子、一个磷酸基团和四个氮碱基之一组成：嘌呤 (A)、嘧啶 (T)、胞嘧啶 (C) 或鸟嘌呤 (G)。