Experts at the foundation warn that Americans have been steadily cutting back on their sleep, and point out that significant numbers of traffic and industrial accidents are caused by sleep deprivation and fatigue.

• 该基金会的一些专家警告说，美国人的睡眠时间越来越少，他们认为很大一部分交通事故和工伤事故都是因为缺觉或过度疲劳造成的。