nucleotide base

• 核苷酸碱基

nucleotide base的用法和样例：

例句

1. Each step of the double helix is a base made up of two kinds of nucleic acid.
   每阶二重螺旋线都是一个碱基，由两种核酸组成。
2. The human genome contains approximately three billion chemical base pairs.
   人类基因组包含大约三十亿个化学碱基对。