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SSS 2011-05-04

时间:2011-06-04 08:39来源:互联网 提供网友:wanglihong80   字体: [ ]
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    (单词翻译:双击或拖选)

This is Scientific American's 60-Second Science. I'm Cynthia Graber. This will just take a minute.

Parents wring1 their hands over infant sleep patterns. And so when those patterns change, parents tend to panic. But if your baby is sleeping more or napping at weird2 times, maybe he or she is just growing. So says a study in the journal Sleep.

It's known that levels of growth hormone3 rise during certain stages of sleep. So researchers wanted to know more about the link between sleep and growth. They recruited the parents of 23 infants. The parents took careful real-time notes on infant sleep patterns for between four and 17 months. They also noted4 whether the babies were breast- or bottle-fed, and whether they had signs of illness such as rashes or diarrhea. And the babies' body length and weight were measured regularly.

The researchers found that periods where infants slept more overall corresponded with growth spurts5 and also a gain in weight and body fat. Both genders6 experienced that correlation7, though boys had more and shorter sleep episodes than girls. The scientists note that increases in sleep may lead to increases in waking, as growing bones produce growing pains. So if your baby's sleeping a little funny, maybe she's just growing up.

"Rock a bye baby, on the tree top."

Thanks for the minute. For Scientific American's 60-Second Science, I'm Cynthia Graber.

"When the wind blows, the cradle will rock.Rock,rock,rock a bye baby."


点击收听单词发音收听单词发音  

1 wring 4oOys     
n.扭绞;v.拧,绞出,扭
参考例句:
  • My socks were so wet that I had to wring them.我的袜子很湿,我不得不拧干它们。
  • I'll wring your neck if you don't behave!你要是不规矩,我就拧断你的脖子。
2 weird bghw8     
adj.古怪的,离奇的;怪诞的,神秘而可怕的
参考例句:
  • From his weird behaviour,he seems a bit of an oddity.从他不寻常的行为看来,他好像有点怪。
  • His weird clothes really gas me.他的怪衣裳简直笑死人。
3 hormone uyky3     
n.荷尔蒙,激素,内分泌
参考例句:
  • Hormone implants are used as growth boosters.激素植入物被用作生长辅助剂。
  • This hormone interacts closely with other hormones in the body.这种荷尔蒙与体內其他荷尔蒙紧密地相互作用。
4 noted 5n4zXc     
adj.著名的,知名的
参考例句:
  • The local hotel is noted for its good table.当地的那家酒店以餐食精美而著称。
  • Jim is noted for arriving late for work.吉姆上班迟到出了名。
5 spurts 8ccddee69feee5657ab540035af5f753     
短暂而突然的活动或努力( spurt的名词复数 ); 突然奋起
参考例句:
  • Great spurts of gas shoot out of the sun. 太阳气体射出形成大爆发。
  • Spurts of warm rain blew fitfully against their faces. 阵阵温热的雨点拍打在他们脸上。
6 genders 83bb1a3a9f58b3256de7992ae4edb965     
n.性某些语言的(阳性、阴性和中性,不同的性有不同的词尾等)( gender的名词复数 );性别;某些语言的(名词、代词和形容词)性的区分
参考例句:
  • There are three genders in German: masculine, feminine and neuter. 德语中有叁性:阳性、阴性和中性。 来自辞典例句
  • Japan was fourth among the genders of foreign students. 日本在二十个留美学生输送地中列第四位。 来自互联网
7 correlation Rogzg     
n.相互关系,相关,关连
参考例句:
  • The second group of measurements had a high correlation with the first.第二组测量数据与第一组高度相关。
  • A high correlation exists in America between education and economic position.教育和经济地位在美国有极密切的关系。
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