A capability for asymmetric division and the production of cells that become differentiating more mature cells, those are properties of stem cells.

能够完成不对称分裂,以及产生细胞,并分化成为一些更成熟的细胞,这些是干细胞的性质

耶鲁公开课 - 生物医学工程探索课程节选

When cells become more like cells of the mature brain they're said to differentiate into brain cells.

当细胞变得越来越像成熟的脑细胞的时候,我们就称其为分化成了脑细胞

耶鲁公开课 - 生物医学工程探索课程节选

As division happens and the developing organism acquires more and more cells, individual cells become differentiated, they become more and more like their final mature form.

分裂过程不断发生,以及发育中的有机体对更多细胞的需求,细胞个体便逐渐分化,它们越来越接近成熟细胞的样子

耶鲁公开课 - 生物医学工程探索课程节选

They become activated and they produce, eventually, mature cytotoxic T-cells in large numbers.

细胞毒性T细胞活化后,开始增殖,最终,产生大量成熟的细胞毒性T细胞

耶鲁公开课 - 生物医学工程探索课程节选

Now, these Th-cells, helper T-cells, go on to stimulate B-cells, and it's these B-cells that become the mature antibody producing cells that make quantities of antibody that fill up in your body.

这些辅助性T细胞,进一步刺激B淋巴细胞,从而使这些B淋巴细胞,逐渐发育成成熟的抗体生成细胞,可在体内产生大量抗体

耶鲁公开课 - 生物医学工程探索课程节选