This stem cell which is reproduced still has the potential to undergo asymmetric division but this one does not.

新生成的干细胞,仍然有潜能进行不对称分裂,但定向祖细胞就不行

耶鲁公开课 - 生物医学工程探索课程节选

One result of this asymmetrical division is a committed progenitor cell.

这种不对称分裂的一个结果,是产生定向的祖细胞

耶鲁公开课 - 生物医学工程探索课程节选