In 1981 children in the United States spent an average of slightly less than two and a half hours a week doing household chores; by 1997 they had spent nearly six hours a week.
1981年，美国儿童平均每周花在家务上的时间略少于两个半小时；到1997年，这个时间达到近6个小时。
The clock strikes the hours but not the half hours.
这个钟是正点打点报时而不是半小时打点报时。
When he comes back two and a half hours later, they're still staying in the same place, continuing the same conversation on the same topic.
当他两个半小时后回来时，他们还在同一个地方，继续就同一个话题进行着同样的谈话。
Yunbo: Rumei, our flight leaves in two and a half hours.
云波：如梅，再过两个半小时我们的航班就要起飞了。
The historical drama eventually clocked in at three and a half hours.
这部历史剧最终的时长达三个半小时。
Mr Lee spends about one-and-a-half hours a day updating his own microblog.
李先生每天用一个半小时左右的时间来更新他的微博。
The two candidates debated for one and a half hours on nationwide television.
两个候选人在全国(性的)电视上辩论一个半小时。
On April 28, I gave four and a half hours of videotaped testimony in another Whitewater trial.
4月28日，在白水事件中的又一次审判中我提供了四个半小时的录像证词。
During eight hours of sleep, people dream for a total of one and half hours on the average.
在睡觉的八小时，每个人平均做梦的总时间为一个半小时。
Mount Snow, only two-and-a-half hours by car from Boston, has seen a jump in drive-up business.
山雪（Mount Snow），离波士顿仅两个半小时车程，已经看到驾车来滑雪的人增多。
Two and a half hours later, when the concert was over, people were crying and hugging one another.
两个半小时后演唱会结束了，在场的人彼此相拥而泣。
Tracy and Steven had been up for two and a half hours, preparing our breakfasts and tidying the train.
特莱丝和斯蒂文已经起床两个半小时了，正为我们准备早餐和打扫卫生。
Normal people need eight to eight-and-a-half hours of sleep.These people sleep five and a half to six.
一般人需要八到八个半小时的睡眠，而这些人只需要睡五个半到六个小时。
Normal people need eight to eight-and-a-half hours of sleep. These people sleep five and a half to six.
一般人需要八到八个半小时的睡眠，而这些人只需要睡五个半到六个小时。
The American Time Use Survey found that employed people work an average of seven and a half hours a day.
美国人时间使用调查结果发现受雇佣者每天工作的平均时间为7.5小时。
It takes the space station one and a half hours to fly around the planet, making for 16 complete laps a day.
空间站环绕地球一周需要1个半小时，每天可以转16周。
American children also have one of the shortest school days, six-and-a-half hours, adding up to 32 hours a week.
美国小孩每天的上课时间也是最短的，6.5小时，每周总计32小时。
Even though it's just one and a half hours away by bus, Rui only came home to see his family a few times a year.
他一年只能回家一两次，尽管南京离他家只有一个半小时路程。
I finished the testimony at about six-thirty, three and a half hours before I was scheduled to address the nation.
约6点半，我的作证结束了。按计划，三个半小时后我就得向全国发表电视讲话。
Internet usage is up to four-and-a-half hours on the Web each week, compared to three-and-a-half hours a year ago.
一年前，万维网的使用率为每周3.5小时，而现在达到了4.5小时。
This will increase the amount of time a soldier can safely spend on board from just one and a half hours to ten hours.
这将使士兵的乘坐时间从只有一个半小时延长到十个小时。
Lorry drivers in the European Union are not allowed to drive for more than four and a half hours without taking a break.
欧盟的卡车司机不允许连续开车超过四个半小时。
Almost three-and-a-half hours of a woman's day is taken up with domestic work, compared to less than two hours for men.
女人一天中差不多有三个半小时用来做家务，相比之下男人只花费不到两小时。
A typical mobile-phone battery should provide about three-and-a-half hours of television viewing before needing to be recharged.
一般的手机电量应该提供大约三个半小时的电视观看时间。
It's the fastest average speed in the world for a passenger train and cuts the trip time from 10 and a half hours to three hours.
这差不多是全世界运载旅客火车的最高平均时速，也把这段原本需要10个半小时的行程，缩减为了3个小时。
None of the locals complained when the bus didn't leave Khiva for four-and-a-half hours. Rather, they just lolled around and waited.
巴士在希瓦延误了四个半小时，但是没有一个本地人有任何抱怨，他们只是四处闲逛，耐心等待。
For a majority of undergraduates, beyond the two and a half hours per week in class, contact ranges from negligible to nonexistent.
对于大多数本科生来说，除了每周两个半小时的课堂时间，与教授接触的时间从可忽略不计到不存在。
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