And so, he tried to diffuse that with a pun by saying, Non sum rex said Caesar.

于是,他想用一句双关语来辟谣,凯撒说"余非君"

耶鲁公开课 - 古希腊历史简介课程节选

It refers to usually 'receptors' that are fixed in a cell, on a cell membrane, and 'ligands' which are dispersed throughout the body and free to diffuse around, and occasionally will find the cell.

受体这个词通常代表了,固定于细胞表面的分子,而配体分散于体内各处,能够自由扩散,它们偶尔会与细胞邂逅

耶鲁公开课 - 生物医学工程探索课程节选