all the members of a family group of people or animals over a period of time, especially when considering their shared family characteristics血统;(动物的)种系
Ismailis believe that a bloodline joins the Aga Khan to Mohammed.伊斯玛仪派穆斯林相信阿迦汗和穆罕穆德属于同一血统。
This is a pedigree poodle - her bloodline is pure.这是一条纯种的鬈毛小母狗——是纯种的。