Adrenaline is another one, produced by cells in your adrenal gland but used by cells all over your body.

肾上腺素是另一个例子,肾上腺素由肾上腺细胞分泌,但全身各处的细胞都能利用它

耶鲁公开课 - 生物医学工程探索课程节选

An example is production of certain molecules called cytokines by T-cells that activate themselves.

细胞能分泌这类叫做细胞因子的分子,实现自激活

耶鲁公开课 - 生物医学工程探索课程节选