This is what makes cells different, the number and quantity of the genes that they express.

这就是细胞产生差异的原因,即表达的基因在数量和质量上的差异

耶鲁公开课 - 生物医学工程探索课程节选

It turns out, it's part of a big picture and all of general relativity is based on this one great equivalence of two quantities which are very different attributes.

已经证明的是,这确实只是冰山一角,广义相对论的所有理论,都是建立在这两个质量相等的基础之上,而这两个质量的属性有很大差异

耶鲁公开课 - 基础物理课程节选