For reasons of mathematical purity, they all assumed an infinite population size.

出于数学运算纯粹性的要求，这些模型都得把种群规模假设为无穷大。

youdao

We talked about two weeks ago, that if you had a population of cells, you could grow those population of cells and you could make, if they adapted the culture properly, you could make an infinite number of cells from one starting solution.

两周前我们讲到,如果你有一群细胞,你可以使细胞数量增长,如果培养得当,你可以,从开始的营养液中制造出无限数量的细胞

耶鲁公开课 - 生物医学工程探索课程节选