People lived shorter lives and so they didn't get far enough into the age span to suffer from the chronic diseases that people are suffering more today.

当时的人寿命比较短所以他们,活不到现代人那么长,长得足以患上那些慢性疾病

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选