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The massive decline in sleep happened so slowly and quietly that few seemed to notice the trend.
人們的睡眠時間在逐漸減少，然而這一發(fā)展趨勢是如此緩慢、悄然，以至于很少有人察覺。
Was it because of the growing attraction of the Internet, video games and endless TV channels? Never disconnecting from work?
是因為網(wǎng)絡(luò)、視頻游戲和無間斷播放的電視節(jié)目吸引力太大了嗎？還是因為處于工作需要要時刻保持聯(lián)絡(luò)方式暢通？
No matter how it happened, millions of Americans are putting their health, quality of life and even length of life in danger.
無論是什么原因，美國人都已經(jīng)讓自己的健康、生活品質(zhì)甚至壽命面臨風(fēng)險。
New evidence shows why getting enough sleep is a top priority.
有新證據(jù)證明了充足睡眠的頭等重要地位。
Some 40 percent of Americans get less than seven hours of shut-eye on weeknights.
40%的美國人在工作日每天睡眠時間少于7個小時。
"The link between sleep and health, and bad sleep and disease, is becoming clearer and clearer," says Lawrence Epstein, a sleep expert at Harvard University.
哈佛大學(xué)睡眠研究專家，勞倫斯·艾普斯坦說，“睡眠與健康之間，以及缺乏睡眠與疾病之間的聯(lián)系已經(jīng)日益明顯”。
For example, sleep duration has declined from some eight hours in the 1950s to seven in recent years.
比如：近年來人們的睡眠時長已經(jīng)從20世紀(jì)50年代的八小時縮短到七小時。
At the same time, high blood pressure has become an increasing problem.
同時，高血壓的發(fā)病率在不斷升高。
Blood pressure and heart rate are typically at their lowest levels during sleep;
通常，人睡著時血壓和心率處于最低水平。
people who sleep less tend to have higher blood pressure, heart attack, diabetes, weight gain and other problems.
睡眠少的人可能患上高血壓、心臟病、糖尿病；或者出現(xiàn)肥胖等其他問題。
Sleeping better may help fight off illness.
好的睡眠能夠抵御疾病。
"When people are sleep-deprived, there are higher levels of stress hormones in their bodies, which can decrease immune function,"
“人們?nèi)狈λ邥r，體內(nèi)的壓力荷爾蒙水平較高，導(dǎo)致免疫功能降低，”
says Dr. Phyllis Zee of Northwestern University in Chicago.
芝加哥西北大學(xué)菲利斯·徐說道。
A University of Chicago study shows people who sleep well live longer.
芝加哥大學(xué)一項研究表明睡眠質(zhì)量好的人壽命更長。
So say good night sooner, and it may help you stay active and vital to a ripe old age.
所以，早點睡覺，這樣你才能有一個充滿活力的晚年。
Questions 16 to 18 are based on the passage you have just heard.
請根據(jù)你聽到的內(nèi)容回答16-18題。
Question 16. What is the speaker mainly talking about?
問題16：說話者主要討論了什么問題？
Question 17. What do we learn from the talk about today's Americans?
問題17：根據(jù)以上內(nèi)容我們對如今的美國人有什么了解？
Question 18. What does the speaker say will happen to people who lack sleep?
問題18：說話者認(rèn)為缺乏睡眠的人會怎樣？
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