And shift workers and frequent fliers can develop a circadian rhythm disorder.轮班工人和频繁飞行者会出现睡眠节律障碍.Circadian rhythms show persistent, stable periodicities of about 24 hours.昼夜节律表现出大约24小时的连续而稳定的周期性.upset sb.’s circadian cl...
Unless we're all a lot more careful, the people who have died so far will be just the tip of the iceberg.除非我们都加倍小心，否则死者的人数会比现在多得多。In 1981, five members of a climbing party died while scaling Mount Hood.1981 年，一支登山队的...