Either there will be nobody there or more likely there will be not a very big population, and it's not very tough, and they could be easily brushed aside.

所以要么那个地方没有人烟,要么就是人口稀少的部落,并不是很顽强,很容易就能被军队驱逐

耶鲁公开课 - 古希腊历史简介课程节选

One reason is that they're present in very small numbers.

一个原因就是它们的数量非常稀少

耶鲁公开课 - 生物医学工程探索课程节选

It's harder to find, they're more limited numbers, and in general, more difficult until eventually down this pathway you have fully differentiated cells, cells that are fully mature and performing the function of the mature organ.

不过找起来更困难,因为它们数量稀少而且通常很难定位,在分化的终末阶段,你可以看到完全分化的细胞,这些细胞完全成熟,在成熟的器官中发挥功能

耶鲁公开课 - 生物医学工程探索课程节选

Now, in the process of doing that they found some very rare stem cells that are called pluripotent, pluri just means many potencies.

如今在这种研究进行的过程中,他们发现了一些非常稀少的干细胞,称为多能干细胞,pluri这个前缀就是指很多能力

耶鲁公开课 - 生物医学工程探索课程节选