After a long walk of four hours, he wore a black sweat.
长途跋涉四个小时后，他出来一身脏汗。
People spend an average of four hours a day watching TV.
人们平均每天看四个小时电视。
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。
Our obligations: to provide you with information within four hours of request, etc.
我们的义务：为您提供四小时服务的信息服务，等。
They normally build one made of snow, for survival courses, within three to four hours.
在锻炼生存能力的课堂上，他们通常在三四个小时内就能搭建出一座雪屋。
Come the end of the show, people have already been there four or five hours.
演出结束的时候，人们已经玩了四、五个小时了。
Don't eat a heavy meal within four hours of going to bed.
在睡觉前四小时之内不要吃油腻食物。
S. Internet users - for an average of more than four hours a month.
美国90%的网络用户都使用社交网络，平均每月超过4个小时。
He leaped four hours ahead of himself.
他要提前4小时起床。
These small tablets contain one drop of hydrochloric acid and they last about four hours.
这些小片剂每片含有一滴盐酸，药效持续四个小时左右。
I was one of the lucky ones, going without power for about four hours.
我属于幸运的一户，电只停了大约四个小时。
Another advantage is that some DVDs can store as much as four hours of programmes.
另外一个好处就是有的DVD节目储存时间可以达到四小时之久。
The ball can store up to twenty-four hours' worth of power.
该球可以储存长达24小时使用的电力。
I was rescued two hours later by four of my staff.
两个小时后，我的四名部属赶到救了我。
I only got four hours of sleep last night.
我昨晚上只睡了四个小时。
Four hours later, the beginning of the first busy day.
四个小时之后，开始忙碌的第一天。
Why are there CARDS heart, box, flower, color of Spades four hours?
扑克牌为什么有红桃、方块、草花、黑桃四种花色之分？
Sleeping for six hours produced less forgetting than four hours or less of prior sleep.
相比于四小时或者更少的睡眠时间，六小时睡眠造成的遗忘程度要轻一些。
I worked four hours of overtime yesterday.
我昨天加班四个小时。
More than four hours of sleep?
超过四小时的睡眠?。
They might get three to four hours of sunlight a day, " he says."
可能每天有三到四小时的阳光“。
There she underwent additional surgery and four hours a day of intense physical therapy.
在那里，她又接受了外科手术治疗和每天四小时的强化理疗。
There she underwent additional surgery and four hours a day of intense physical therapy.
在那里，她又接受了外科手术治疗和每天四小时的强化理疗。
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