To study sleep deprivation (not getting enough sleep), scientists use a test called the Multiple Sleep Latency Test (MSLT). During the test, a person stays in a darkened, quiet room during the daytime. Scientists believe that a sleep-deprived person will fall asleep quickly. If it takes ten minutes or longer to fall asleep, the person is probably getting enough sleep.
Scientists have also found that the time of year seems to affect how much sleep we need. ____5____ However, in the summer, people sometimes sleep as little as six hours, without having any problems.
词汇:
emotion n. 情绪 commuting n. 乘公交车上下班,通勤
I.Q. n. 智商(全称为intelligent quotient) deprivation n. 剥夺,匮乏
Sleep Latency Test n. 睡眠潜伏期
注释:
1.have/has an effect on... 对……有效果的
2.go down from... to...从………降至……
练习:
A They allow them to “power nap” in the afternoon, if only for 20 minutes.
B Losing just one or two hours of sleep a night, over a long period of time, can cause serious health problems.
C People usually sleep longer in the winter, sometimes as much as 14 hours a night.