In time the physiological system will reset itself, but it does take time.⑾ One easily monitored rhythm is palm sweating. A man flown to a time zone different by 10 hours will take eight days to readjust his palm sweat. Blood pressure, which is also rhythmical, takes four days to readjust.(12)
11.In time the physiological system will reset itself, but it does take time.
it does take time 是强调谓语动词。经过一段时间后,生理系统将会自我调整过来,但这需要时间。
12.which 引导非限制性定语从句, 修饰blood pressure.
此句意思:血压也是有节奏性的,需要4天才能调整过来。
One reason for this discrepancy is that different bodily events are controlled by different factors. (13) The hormone cortisol, which controls salt and water excretion, is made in the morning, wherever the body is. But the growth hormone is released during sleep, whenever in the day that sleep occurs. (14 ) Normally these two hormones are separated by seven or eight hours, but if the body arrives at a destination in the early morning (local) and goes to sleep as soon as possible, the two hormones will be released simultaneously.
14.whenever 引导时间状语从句。Whenever in the day 意为“不管在一天中的什么时候”;that sleep 是从句的主语,that 是指示代词修饰sleep.
全句意思:但生长激素在睡眠时才分泌,而不论一天中什么时候睡觉。
What can we do about it? It is not feasible to wait four days until the body is used to the new time zone. Fortunately there is a short cut. It relies on two things - the power of the stomach to regulate the timing of other events, and the pharmacological actions of coffee.
The basic assumptions are:
Coffee delays the body clock in the morning, and advances it at night. Coffee at mid-afternoon is neutral. (15)