癌基因符号前的前缀“v-”表明获得性及由反转录病毒传递的癌基因。

A prefix of "v-" before oncogene symbols indicates oncogenes captured and transmitted by RETROVIRUSES;

youdao

实际上，在人类和黑猩猩中，几乎有三分之一的共有基因（每个基因由数千个遗传符号组成）是完全一致的。

In fact, almost a third of the shared genes (each of which is several thousand letters long) are identical in the two species.

youdao

这两套基因组近乎一致，全部基因由大约30亿对遗传“符号”编写而成的，但两套基因组的仅有1.2％的差异率。

The two genomes are alike, differing by only 1.2% over the course of some 3 billion pairs of the genetic “letters” in which the language of genes is written.

youdao