日韩精品久久一区二区三区_亚洲色图p_亚洲综合在线最大成人_国产中出在线观看_日韩免费_亚洲综合在线一区

您現在的位置: Language Tips> Easy English> Odd Question  
 





 
How much sleep do we need?
[ 2005-07-11 08:00 ]
sleep  
How much sleep do we need? Notes:

The amount of sleep an individual requires varies from person to person, but most adults average eight hours of sleep.

Sleep plays a vital role in our dailyregimen, as during this dormant period, it recharges andrejuvenatesweary body organs and tissues, and restores the body to an alert state. A person's lifestyle is another variable in the amount of time he needs to achieve this healthy balance, and to feel well rested upon awakening.

The quality of a person's sleep also factors into the sleep equation. When we drift off to sleep, we either fall into a deep, restful sleep, or into a shallow, light sleep. One who normally requires eight hours of sleep, but sleeps shallowly, will most likely awaken feeling tired. In contrast, if the same individual sleeps fewer hours, but lapses into a state of deep sleep, he may well awaken refreshed andinvigorated.

A lucky few can bypass shallow sleep altogether, and fall directly into deep sleep on an as needed basis. Alexander the Great's militaryprowessmay have been due, in part, to his ability to take a "cat nap."

Yet one more variable factors into the amount of sleep we require: that of the brain and of the body sleeping simultaneously. Under normal circumstances, the brain's sleep center blocks off the nerves to the brain and to the body to make sleep possible. The brain has no interest in doing anything, and could not even if it did, because the sleep center has shut down the internal organs, the arms, and the legs. Sometimes, however, the sleep center is unsuccessful in shutting down both the brain and the body at the same time. For example, in times of war, it is not unusual for soldiers suffering from sleepdeprivationand from combat fatigue to continue to march, despite the fact that their brains have halted. Thankfully, such a situation is ananomaly, and does not occur with great frequency.

 

 

regimen: 生活制度
rejuvenate:使恢復,使年輕

 

 

 

 

 


invigorated
:精神煥發的


prowess:威力

 

 

 



deprivation:剝奪

anomaly:不正常的

 
 
相關文章 Related Stories
 
 
 

本頻道最新推薦

     
  為什么下雪時天氣暖
  You are the smartest fish I've ever seen!
  Dog burger
  為什么老了脾氣好
  飛蛾為什么撲火

論壇熱貼

     
  開個題目大家扯:hotel & restaurant
  追求某人
  請教工商年檢如何翻譯
  How to translate “中國老字號”into English?
  "港股直通車"怎么翻譯?
  兩免一補怎么說?




主站蜘蛛池模板: 欧美激情在线观看一区二区三区 | 三级国产精品一区二区 | 波多野结衣在线看片 | 日本成人中文字幕 | 日韩一区二区免费视频 | 一区二区自拍 | 黄色羞羞视频在线观看 | 日韩一级a毛片欧美一级 | 亚洲高清久久 | 久久人人爽人人爽人人片va | 国产高清视频a在线大全 | 黄色网z | 成人精品视频在线观看 | 日韩一区二区在线视频 | 午夜电影在线观看 | 国产日产亚洲欧美综合另类 | 免费看黄网 | 色综合网站在线 | 91观看 | 久久亚洲欧美日韩精品专区 | 亚洲一区中文字幕 | 亚洲精品乱码久久久久久v 国产高清免费视频 | 5c5c5c精品视频在线观看 | 色综合网站 | 国产三级在线视频播放线 | 天天操天天拍 | 黄色网在线播放 | 久久中文字幕网站篠田优 | 久久福利剧场 | 久久久av | 日韩城人免费 | 天天碰天天摸天天操 | 日本吻胸捏胸激烈床戏视频 | 精品久久久久久国产 | 色综合久久天天综合网 | 精品国产一区探花在线观看 | 欧美精品导航 | 亚洲一级毛片中文字幕 | 99在线国产| 国产精品视频网 | 日韩 欧美 国产 亚洲 中文 |