Opposition Republicans responded to the latest figures by focusing on specific sectors that continue to lag and renewing their assertions that steps President Obama has taken since he came to office, such as the $787 billion stimulus, have had little impact on the economy.

VOA: standard.2009.12.05

Those are called embryonic stem cells, they are self-renewing, and they are pluripotent, meaning they have many potencies.

这些称为胚胎干细胞,它们可以自我更新,且是多能干细胞,即它们有多种潜能

耶鲁公开课 - 生物医学工程探索课程节选

It's not self-renewing, in that division of the zygote results in two daughter cells that are no longer the zygote anymore, they're down some pathway.

它是不会自我更新的,受精卵分裂后成了两个子细胞,而这两个子细胞就不再是受精卵了,它们沿着某种路径进行了分化

耶鲁公开课 - 生物医学工程探索课程节选

They still have broad potential and they're self-renewing and so there's much interest in those.

它们还有广泛的潜能,同时也能自我更新,因此还是很有有趣的

耶鲁公开课 - 生物医学工程探索课程节选