One of the interesting properties of cells that are in exponential growth is that the time to increase the cell number by a factor of 2 is always the same.

细胞有一个有趣的性质,那就是在指数增长阶段,细胞增长的速度,永远是以二为底数来增长的

耶鲁公开课 - 生物医学工程探索课程节选

Home prices are falling at the highest rate we've ever seen. I have my own index s Case-Shiller indexes the Standard & Poor's Case-Shiller indexes and we announced our indexes yesterday.

房价正在以我们从未见过的速度下跌,我有自己的一个指数,名字叫The，Standard&Poor’,而且昨天我们公布了我们的指数。

耶鲁公开课 - 金融市场课程节选