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

Much easier to keep a flask of cells under very sterile, very reproducible conditions than it is to keep a small animal, right?

保存一小瓶细胞,该细胞可在无菌条件下再生,这要比保存小动物容易的多

耶鲁公开课 - 生物医学工程探索课程节选

Another thing that's different about human cells and animal - human cells and bacterial cells is that many bacterial cells can swim and can exist in suspension, that means just suspended in a fluid.

人类细胞和动物细胞--,和细菌细胞,另一个重要不同是,许多细菌细胞可以游动,可以生活在悬浮液中,就是说可以悬浮在液体中

耶鲁公开课 - 生物医学工程探索课程节选