Involvement in sports, in particular, rose almost 50% from 1981 to 1997: boys now spend an average of four hours a week playing sports; girls log half that time.
特别体育运动参与率从1981年到1997年上升了近50%：男孩们现在平均每周花四个小时做运动；而女生则只花一半的时间。
That's based on all of four hours playing with it.
当然这些仅仅我只是玩了四个钟头后的感想和体验。
Four hours of sleep in the twenty-four had meant being robbed of four hours of life.
他在二十四小时里只睡四小时还嫌四小时生活时间被剥夺。
After the clamps are applied place in oven for a minimum of four hours at 150 to 180 degrees.
在钳位以后应用的地方在烤箱最小限度于四个小时在150到180度。
And in the course of four hours I watched my brain completely deteriorate in its ability to process all information.
在接下来的四个小时里，我静静地观察着我的大脑失去信息处理功能的全部过程。
What intrigued the researchers about this gamma ray burst is that it flared up four times over a period of four hours.
使得研究人员对该伽马射线暴好奇的是在短短四个小时内它竟燃起了四次。
Requires 120 hours of approved continuing education including a minimum of four hours of ethics training every three years.
需要每三年包括至少四小时的道德规范训练的120小时的经核准继续教育。
The U8E has a top speed of 150 kilometers an hour, endurance of four hours, range (from operator) of 150 kilometers and a payload of 40 kg (88 pounds).
U8E最高飞行速度一小时150公里，续飞时间四个小时，航程150公里（从操作员）和负载40公斤（88磅）。
One scientist, who has studied this topic extensively, claims a loss of four hours of sleep produces as much impairment as consuming a six-pack of beer.
一位一直广泛研究这个主题的科学家称，少睡四个小时造成的损害与喝六瓶啤酒不相上下。
One scientist, who has studied this topic extensively, claims a loss of four hours of sleep produces as much impairment as consuming a six-pack of beer.
一位一直研究这个问题的科学家称，少睡四个小时造成的损害与喝六瓶啤酒不相上下。
Scientists estimated that 8 per cent of the deaths might have been avoided if TV viewing times had been reduced from the UK average of four hours a day to just one hour.
科学家估计如果看电视的时间从英国每天平均4个小时降到一个小时的话，会降低百分之八的死亡人数。
Once the fire is going in the stove, Turner directs the heat and smoke into the chamber, and the eels are cooked at 160 to 180 degrees Fahrenheit for a minimum of four hours.
炉火烧着后，特纳把热量和烟引进房间，在华氏160至180的温度中熏制鳗鱼至少四个小时。
For example, our research found that a stunning 99 percent of university students and professionals ages 22 to 35-the key consumers of the future-are online an average of four hours a day.
比如说，我们的研究发现令人震惊，高达99%的年龄在22岁到35岁之间的大学生和职业人士——未来主流消费人群——日均上网时间平均为4小时。
The Egyptians probably measured their day in twenty-four hours of unequal length.
埃及人很可能用不同长度的24小时来计量他们的一天。
Miss Pearce said she expected an unqualified retraction of his comments within twenty-four hours.
皮尔斯小姐称她希望他在24小时内无条件收回他的言论。
If Steel was routinely sleeping for four hours a night, she would be drastically underestimating the negative impact, says Alison Gardiner, founder of the sleep improvement programme Sleep station.
睡眠改善项目“睡眠站”的创始人艾莉森·加德纳说，如果斯蒂尔通常每晚只睡4个小时，她就大大低估了其负面影响。
Practicing a piece of music for four hours requires focused attention, but it is nowhere near as cognitively demanding as a sleepover with 14-year-old girls.
练习一段音乐4个小时需要集中注意力，但它远不及一个在外过夜的14岁女孩对认知的要求。
Finally, after about four hours of walking around, we were back.
走了大约四个小时后，我们终于回来了。
Today's children spend an average of four and a half hours a day looking at screens, split between watching television and using the Internet.
现在的孩子平均每天花四个半小时看屏幕，一半看电视，一半上网。
According to a study by Australian National University, Australian children and Chinese children have the same level of eyesight before they start school, but once they enter primary school, Chinese children only spend about an hour a day outside, while Australian children spend three to four hours each day in the sunshine.
澳大利亚国立大学的一项研究显示，澳大利亚的孩子和中国的孩子在入学前的视力水平相同。但是一旦他们进入小学，中国的孩子每天只会在户外度过一个小时，而澳大利亚的孩子每天在阳光下待三到四个小时。
With just four hours of training it helped them improve their lip-reading skills markedly.
只进行了四小时的训练，唇读器有效地帮助他们改善了唇读技巧。
It also doesn’t help that here above the Arctic Circle we were getting only about four hours of dusklike sunlight a day.
这儿是北极圈以北的地区，一天当中大约只有四个小时暮气沉沉的阳光，对游客不甚方便。
Following four hours of grueling competition and eight laborious costume changes, it's time to determine the winner.
接着四小时的折磨人的竞赛和七八次费力的更换装束，现在是决定获胜者的时刻。
Finally I was free - no more sharing a room, no more being harassed, and best of all, no more nights of only four hours of sleep.
我终于自由了——不用再分享一个房间，不会再感到精疲力竭，而且最好的是，不会再经历只有四小时睡眠的难熬夜晚了。
“My first year, I didn't get more than three or four hours of sleep a day,” he says. Changing jobs was not an option.
我工作的第一年每天无法保证三到四小时的睡眠时间按，所以，更换工作成了不得以的选择。
If I can earn a comfortable living in four hours a day instead of eight, then I have successfully bought myself an extra four more hours for actual living.
如果我用四个小时而不是八个小时挣到过舒适生活的钱，那我就成功的使我有了额外的四个小时享受生活。
If I can earn a comfortable living in four hours a day instead of eight, then I have successfully bought myself an extra four more hours for actual living.
如果我用四个小时而不是八个小时挣到过舒适生活的钱，那我就成功的使我有了额外的四个小时享受生活。
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