参考例子
           - 1.group of genetically related organisms constituting a single step in the line of descent.
 - 遗传上''。'相关'。''的有机体群,在世系线上组成了单独的一步。
 
- 2.group of genetically related organisms constituting a single step in the line of descent.
 - 遗传上相关的有机体群,在世系线上组成了单独的一步。
 
- 3.Cell lineage strictly refers to a genetic line of descent, telling us the ancestry of a cell in question.
 - 细胞谱系指遗传家系的传承,说明的是细胞的来源问题。
 
英文解释
           - n.
 - 1.the kinship relation between an individual and the individual's progenitors
 - 2.the descendants of one individual
 
网络释义
               - line of descent
 - 血统系; 血统系, 起源系; 系谱;
 
- line of quickest descent
 - 最速降线; 最快速下降线;
 
- line of steepest descent
 - 最速下降线;
 
- line of swiftest descent
 - 最速下降线; 最速 线;
 
- direct line of descent one's own clique
 - 嫡系;