Why has it been so hard and why does it continue to be difficult to identify these pluripotent cells within tissues?

为什么会那么难呢,为什么在组织中识别多能干细胞,始终困难重重呢

耶鲁公开课 - 生物医学工程探索课程节选

It's also an example of a tissue specific stem cell.

这同时也是一个组织特异性干细胞的例子

耶鲁公开课 - 生物医学工程探索课程节选