近九点钟时,两位妇女退到楼上自己的房间去,让他独自留在楼下,直到天明。
Toward nine o'clock in the evening the two women retired and betook themselves to their chambers on the first floor, leaving him alone until morning on the ground floor.
我们的生物钟或生物调时系统,对外界黑夜和天明循环的反应,控制着我们每天进食、活动和睡眠的循环。
Our circadian clock, or biological timing system, governs our daily cycles of feeding, activity and sleep, with respect to external dark and light cycles.
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