Besides, researchers in Siberia reported recently that the circadian hormone cycles of experimental subjects who awoke in darkened rooms tended to shift a little later each day.

• 此外，西伯利亚的研究人员最近提出报告，当实验的受试者在黑暗的房间里醒来，他们的全天荷尔蒙周期每天都会往后推迟一些。