Half of Americans have at least one, so it's affecting a lot of the population.

半数美国人至少患有一项慢性疾病,可见其影响之广

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选

Control of gene expression is a very big topic and so I'm going to show you one cartoon to sort of tell you that it is a big topic that's really important.

基因表达的调控是个大课题,我给你们放一些动画,好让你们理解,其涉及范围之广,意义之重

耶鲁公开课 - 生物医学工程探索课程节选