It goes - going through this process of amplifying divisions, every division increasing the number of cells by a factor of two and these cells becoming more differentiated around the way.

它经历了一系列扩增性的分裂过程,每次分化,细胞数目都翻一番,而在此过程中细胞分化得更成熟

耶鲁公开课 - 生物医学工程探索课程节选

And it turned out they got it wrong by a factor of about two.

结果发现他们把注意的人数,高估了一倍。

耶鲁公开课 - 心理学导论课程节选