Stem cells have the ability to act as a repair system forthebody, because they can divide and differentiate, replenishingothercells as long as the host organism is alive.

• 干细胞在人体中的作用相当于一套修复系统。只要主体还活着，干细胞就能不断分裂、分化、提供充足的新鲜细胞。