目前,美国倒班工人至少有2100万,占美国工人总数的26%。据有关专家估计,每4名男工和6名女工中就有1名是倒班工作的,虽然名词“倒班工作”与“夜班工作”常被互用,但严格说来,它们仍有区别,夜班工作指在当日23点到次日6点时间内或在其中一段时间内工作,而倒班工作是某人既在清醒 At present, there are at least 21 million shift workers in the United States, accounting for 26% of the total number of U.S. workers. According to some experts, one out of every four male workers and six female workers is scheduled to work on a shift basis. Although the terms “shift work” and “night shift work” are often used interchangeably, they are still strictly speaking different. Night shift work refers to work at 23 o’clock on the day to 6 o’clock the next day or during a period of time while work shift is when someone is awake