One and a half hours are allowed for the exam.
考试时间为一个半小时。
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。
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。
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。
Four and a half hours of discussion took us up to midnight.
我们讨论了四个半小时，一直讨论到午夜。
Strano's team found that they could create a faint light for three and a half hours.
Strano的团队发现，他们可以在三个半小时内产生微弱的光线。
But that wasn't the only obstacle we had to overcome as a couple — we also lived four and a half hours away from one another.
但这不是我们在一起要克服的唯一的阻碍——我们之间还相隔着四个半小时的路程。
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。
Three and a half hours have just vanished.
三个半小时就这么浪费过去了。
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 boss asked him to explain why he was two and a half hours late.
老板要他解释一下为什么迟到两个半小时。
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。
There are still one and a half hours to go , we needn't be insuch a hurry .
还有一个半小时，我们无需如此慌慌张张。
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。
I don't know how it's happened. Three and a half hours have just vanished.
我也不知道怎么会这样。三个半小时就这么浪费过去了。
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。
Strolling in only two-and-a-half hours late, Mr Putin appeared fit, confident and relaxed.
只是迟到了2个半小时，普京缓步走进来，显得很健康也很自信。
"A hummingbird can hover like a helicopter for one and a half hours, nonstop," Dr. Tobalske said.
“蜂鸟能像直升机一样悬停，且时间可以长达一个半小时，中间不间断，”托巴尔斯克说。
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。
Two and half hours later, after an excruciating silence, Dahl discovered that his niece had survived.
经过两个半小时的痛苦而沉默的等待，达尔发现他的侄女还活着。
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。
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。
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