That's one way of thinking why animal cells have cells from animals and humans have sub-cellular compartments.

这就不难想见,为什么动物细胞,包括,人类细胞有亚细胞结构区域了

耶鲁公开课 - 生物医学工程探索课程节选

I'm not going to talk about them in detail but please look at that to remind yourself of those kinds of specialized sub-cellular units which are present in cells in humans but not present in bacteria.

我就不再赘述了,不过请你们看看书,回忆一下哪些特化的亚细胞结构单元,是人类细胞有,而细菌没有的

耶鲁公开课 - 生物医学工程探索课程节选