“春眠不觉晓”的季节早已过去,但早晨还是睡不醒。特别是前几天夜里,由于写稿而睡得较迟的时候,人打寒战,眼睛就不容易睁开。闹钟的铃声响了,我不得不慢吞吞起床,但头脑还在睡眠之中。生物有体内时钟,以大致一天为周期而划分节律的则称为时辰节律(或称循环节律),但在文明社会中,人们要适应各种外界刺激而生活着,在这种环境中令人忧虑的是生物严重失去固有的机能,体内时钟也会走时不准吗?为此,本文试题体内时钟予以探讨. The season of “spring sleep does not know dawn” is long gone, but still can not sleep in the morning. Especially in the last few days, when people sleep late after writing, people are not able to open their eyes when they are chilled. The alarm clock rang, I had to slowly get up, but my mind is still in sleep. Creatures have an internal clock, which divides rhythms on a roughly day-by-day basis, and is called an hourly rhythm (or circadian rhythm). However, in a civilized society, people adapt to various kinds of external stimuli and live in such an environment Concerned about the serious biological loss of intrinsic function, the body will not go out of the clock it? To this end, the paper questions the body clock to be explored.