Humans are collections of cells, all cells are the same in important ways, but cells acquire differences during development, and so we are collections of billions of cells.

人类是一个细胞的集合,细胞在关键方面都是一致的,但在发育中细胞获得了不同的特点,而我们是一个数以十亿计的细胞的集合

耶鲁公开课 - 生物医学工程探索课程节选

Those billions of cells come from successive rounds of cell division.

这数以十亿计的细胞,都来自一次次的细胞分裂

耶鲁公开课 - 生物医学工程探索课程节选