研究表明，智能手机目前是美国青少年的主要社交形式。
Research has shown that smartphones are currently American teens' main form of social communication.
阅读和理解篇幅更长的书籍和篇章需要练习，而美国青少年不再进行这些练习了。
Reading and comprehending longer books and chapters takes practice, and American teens are no longer getting that practice.
日本警方说，四名美国青少年因被控谋杀未遂而被捕，他们都是美国军人的孩子。
Four American teenagers, all children of U.S. military personnel, have been arrested on charges of attempted murder, Japanese police said.
调查分析显示，美国青少年现在把他们的休闲时间花在电子设备上，而不是阅读纸质书。
Survey analysis shows American teens now spend their leisure time on digital devices rather than reading printed books.
在过去十年左右的时间里，美国青少年对社交媒体的使用从偶尔的活动变成了日常活动。
Over a decade or so, American teens' social media use shifted from an occasional activity to a routine one.
最近的一项研究表明，40%的美国青少年称他们遇到过驾驶时玩手机的司机，这让人处于危险之中。
A recent study said that 40% of American teens claim to have been in a car when the driver used a cell phone in a way that put people in danger.
与此同时，大约1300名美国青少年将前往其他国家。
At the same time, about 1,300 American teenagers will go to other countries.
数据来自美国青少年健康长期研究所。
The data come from the National Longitudinal Study of Adolescent Health.
美国青少年拥有大学学位的比例已降至全球第9位。
America has fallen to ninth in the proportion of young people with a college degree.
汽车碰撞是美国青少年的头号杀手，每年杀死7000多条生命。
Vehicle crashes are the number one killer of American teenagers, claiming nearly 7,000 lives each year.
九月份，美国青少年的失业率为25.9%，这使得更多年轻人想去上大学。
With a teenage unemployment rate of 25.9 percent in September, more young people would like to head to college.
根据2004年的盖洛普民意测验，有一半的美国青少年承认在学校考试作弊。
Half of American teenagers admit to cheating on a school exam, according to a 2004 Gallup poll.
早在1997年，就有研究人员指出，美国青少年青春期发育年龄大大下降。
In 1997 researchers had begun pointing to a dramatic decline in the age of puberty in America.
据悉，美国青少年每晚平均睡眠时间为7小时53分钟，低于专家推荐的9小时睡眠。
On average the teenagers were sleeping 7 hours and 53 minutes a night - less than the 9 hours recommended at that age.
她说：“我们的调查结果表明，电视可能是造成美国青少年怀孕率居高不下的一个很重要的因素。”
"Our findings suggest that television may play a significant role in the high rates of teenage pregnancy in the United States," she said.
八十年代，美国青少年从黑人嘻哈乐歌词的俚语中学来了“dis”一词———这一现象并非偶然。
It is no accident that American teenagers picked up the slang term "dis" from black hiphop lyrics in the 1980s.
美国青少年怀孕率是荷兰的四倍之多，堕胎率则是荷兰的两倍，HIV感染率则高达三倍。
The pregnancy rate is about four times higher in the U.S. than in the Netherlands and abortion rates are about twice as high. HIV rates are about three times higher.
我在以前的帖子中说过，从美国青少年健康纵向研究的抽取检查中发现，外形上更有魅力的人更加聪明。
In a previous post, I show, using an American sample from the National Longitudinal Study of Adolescent Health, that physically more attractive people are more intelligent.
您正在收听对亚伦·卡瓦斯基的采访，他来自美国青少年糖尿病研究基金会，正致力于开发一种人工胰腺。
You are listening to Aaron Kowalski, of the Juvenile Diabetes Research Foundation in the U.S... he is working to develop an artificial pancreas.
有评估显示，与全世界其他同龄人相比，15岁的美国青少年在数学与科学方面甚至不再名列前茅。
One assessment shows American fifteen year olds no longer even near the top in math and science when compared to their peers around the world.
华盛顿——据新闻报道，对于许多美国青少年来说，几乎每天喝5次酒或者更多，不是一个很大的问题。
WASHINGTON - Downing five or more alcoholic drinks nearly every day is not seen as a big problem for many of the nation's teens, a new report says.
被怀疑为“赤脚大盗”的美国青少年在西雅图法庭拒绝承认曾盗窃几架飞机，在没有飞行员执照的情况下进行飞行。
An American teenager suspected of being the "Barefoot Bandit" has pleaded not guilty in a Seattle court to stealing several aircraft and flying them without a pilot's licence.
虽然在过去几十年里美国青少年怀孕率在稳步下降，但在发达国家中，美国仍然是青少年怀孕和分娩比率最高的国家。
Although the pregnancy rate among American teens has dropped steadily in the past few decades, among developed countries the U.S. still has the highest rates of teen pregnancy and childbirth.
在这个星期，疾病控制中心发布的令人不安的报告说，三分之一以上的美国青少年已是吸烟者，尽管他们吸烟是违法的。
Just this week the Centers for Disease Control released a disturbing report that more than a third of teenagers in the United States now smoke, even though it's illegal.
这些导致了她悲哀的结论：在线上生活里，美国青少年在重建他们从现实世界知道的那些——按照社会等级和种族的隔离。
That led to her sad conclusion: in their online life, American teenagers were recreating what they knew from the physical world-separation by class and race.
因而，波伊德女士得出以下负面结论：在网络生活中，美国青少年仍旧会再现自己在现实世界中的认识——阶级与种族的隔离。
That led to her sad conclusion: in their online life, American teenagers were recreating what they knew from the physical world—separation by class and race.
市场调研公司NielsenMobile的数据显示，拥有手机的美国青少年每个月平均要发送和接收2,272条短信息。
Teenagers with cellphones each send and receive 2, 272 text messages a month on average, Nielsen Mobile says.
市场调研公司NielsenMobile的数据显示，拥有手机的美国青少年每个月平均要发送和接收2,272条短信息。
Teenagers with cellphones each send and receive 2, 272 text messages a month on average, Nielsen Mobile says.
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