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。
In one such case, a 50% increase in productivity was observed across a team of 25 analysts using a new SA; in another, the time taken to complete a task was reduced from 2.5 hours to four minutes!
在一个这样的案例中，25位分析人员组成的团队在使用一个新的SA时观察到了50%的工作效率提高；在另一个案例中，完成一项任务所花的时间从2.5小时减少到了四分钟！
The time of interrogation and investigation shall not exceed twenty-four hours in complicated cases subject to detainment according to these Regulations.
对情况复杂，依照本条例规定适用拘留处罚的，讯问查证的时间不得超过二十四小时。
It would be great to see somebody like Gordon Ramsay in there in a force nine, trying to stay imaginative on our stores. And you've got to do it all again in four hours' time.
在九级大风中能看见像名厨戈登.拉姆撒那样的人在开动脑筋为我们打理餐食真是很了不起，而且过了四个小时他们又要重新再来一次。
Out of the seven hours I spent in the park, I was either lining up for or spending time in various means of transportation for about four hours.
我在公园里待了七个小时，其中有四个小时不是在排队，就是在坐各种各样的交通工具。
Twenty-four hours in a day have officially become twenty-one-i thought we needed more time, not less.
那实际上24小时的一天已被缩成21小时了- - -我觉得我们需要更多的时间，而不是更少。
In the UK, the average amount of time spent watching TV is four hours a day compared with five hours in the United States.
在英国，人们平均每天花4小时的时间看电视，而美国人则每天看5小时电视。
They spent a total of 135m hours in traffic delays, burning through almost 96m extra gallons of fuel-four times as much time and almost five times as much fuel as 20 years earlier.
他们一年在交通延误上耗时总计1.35亿小时，额外消耗的燃料差不多达9600万加仑——是20年前延误耗时的4倍，并接近20年前额外耗油的5倍。
Those who spent four or more hours of recreational time in front of a screen were 50 percent more likely to die of any cause.
而花费超过4小时在屏幕前消遣的人死于任何原因的几率高出50%。
For the second time in less than twenty-four hours, I had accepted advice that ran counter to my instincts.
在不到24小时内，我第二次接受了与我直觉相反的建议。
When couples slept together in the same bed the men used the breathing device four hours or more 74% of the time.
当夫妻同睡时，丈夫在74%的时间里使用呼吸装置的时间达到或超过4小时。
Block time early in the day, and block big chunks of it-no less than four hours!
留出每天较早的时段，划出大块的时间——不少于四小时！
In the classroom time only then four hours, one half makes the classroom game, use one's head through the game way, grasp some elementary knowledges and the skill.
在课堂上的时间只有四个小时，其中一半还是做课堂游戏，通过游戏的方式动脑筋，掌握一些基础知识和技能。
Although four hours seem to be quite a long time, it can help people chop down the tree more smoothly and less laboriously in the rest two hours.
虽然四个小时看起来是挺长的一段时间，然而它却可以帮助人们在剩余的两个小时内更加顺利和省力地砍掉树木。
Thee food and Drug Administration recommends that cooked commercial foods should sit out for no more than four hours, as that's the time in which bacteria can grow and multiply.
食品药品管理局建议说，市售食物摆放不得超过四小时，因为四小时内细菌会增加、成倍繁殖。
In the plains, the guerrillas always knew four hours ahead of time when an attack was coming.
在平原上，游击队往往在日军出动前四个小时就得到了情报。
Intensive course: fitting for those want to learn Chinese intently in a period of time. From Moday to Friday, four hours everyday.
密集型课程：适合想在一段时间之内专注于学习汉语的学员。周一到周五，每天三个小时的课时安排。
I suddenly realised it was the first time that I had been alone in years. As a travelling preacher, my life is public twenty four hours a day.
我突然意识到，这么多年以来，这是我第一次独处，作为一位旅行传教士，我的生活每天二十四小时都是公开的。
My conviction that I came in the wrong month this time was reinforced on Monday evening when my plane sat on the ground for four hours as staff tried to de-ice the wings.
我相信自己这次来错了月份，这种想法在周一晚上再次得到强化，当时，由于工作人员要为机翅膀除冰，我乘坐的飞机在机场停了四个小时之久。
They did all of this in four hours after seeing the computer for the first time.
他们在第一次见到电脑4小时后做了这些。
Third: all speak and keep me wait for 24 hours in mail that you replied me each time, there are four such a mail, how much do you really want not to solve the problem until 24 hours?
第三：你们每一次回复我的邮件都说让我等24小时，这样的邮件共有四封，你们到底要多少个24小时才能解决问题？
A new study found better results in four-year-olds who go to bed around the same time every night and sleep at least eleven hours.
一项新的研究发现，每晚按时就寝且睡眠时间至少11小时的4岁儿童具有良好的结果。
A new study found better results in four-year-olds who go to bed around the same time every night and sleep at least eleven hours.
一项新的研究发现，每晚按时就寝且睡眠时间至少11小时的4岁儿童具有良好的结果。
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