They found that two hours of sitting before a bright screen at night reduced the sleep chemical levels by about 22%.
他们发现，晚上坐在明亮的屏幕前两小时，会使睡眠化学物质水平降低约22%。
I can't go though the excises at two hours.
我不能在两个小时内完成这些练习。
Yesterday afternoon, at two hours after my sending the translated version of an article back to her, I was told by somebody to check my bank account.
昨天下午，在二小时在派翻译的一文章背面给她的版本之后，我某人告诉检查我的银行来往账户。
The tourists had waited at the airport for two hours.
游客们在机场已经等了两个小时。
At a minimum, you should spend two hours in the evening studying in order to catch up with your classmates.
为了赶上同学，你晚上至少应该花两个小时学习。
After making a stop for a few hours at a British station on the edge of Antarctica, the two workers were flown to the southernmost Chilean city of Punta Arenas.
在南极洲边缘的一个英国站停留了几个小时后，这两名工人坐飞机到了智利最南端的城市，蓬塔阿雷纳斯。
Food will be served at around 8:30 and then, depending on how long the meal takes, the entertainment will start about two hours later.
我们会在8:30左右开始供应食物，然后根据用餐时间的长短，娱乐项目大概会在2小时后开始。
He hanged himself two hours after arriving at a mental hospital.
他到达精神病院两小时后上吊自杀了。
They won't arrive for at least two hours yet.
他们至少要过两个小时才能到。
The opposition claims primary school pupils doing at least two hours of sport a week have nearly halved.
反对者称，每周至少运动两小时的小学生几乎减少了一半。
He walked two hours at weekends to the market to buy different things to sell around his school.
他周末要走两个小时的路去市场买各种各样的东西，以便在学校周围卖。
Eventually these were superseded by "small clock", or French, hours, which split the day into two 12-hour periods commencing at midnight.
最终，这些被“小钟”——即法语中说的小时取代了，它把一天分成两个12小时的时间段，从午夜开始。
I'd rather get more work hours so I can get enough bucks to help out my two kids at college.
我宁愿有更多的工作时间，就能有足够的钱来帮助我的两个孩子上大学。
A bus can be fully charged in two hours and the charging poles can serve 300 buses a day at our station.
一辆巴士可以在两小时内充满电，我们站的充电杆每天可以为300辆巴士充电。
Some hours after the two-part session, there is a follow-up class at which the students are stimulated to recall the material presented.
这个由两部分组成的课程结束后的几个小时，会有一节后续课程激励学生们回忆所呈现的材料。
They usually work on computers at school for at least two hours during the day.
他们通常每天在学校用电脑学习至少两个小时。
In May 2020, the National Health Commission urged schools to make sure that students have at least two hours of outdoor activity a day.
2020年5月，国家卫生健康委员会敦促学校确保学生每天至少有两个小时的户外活动。
People started to get impateint after waiting at the gate for two hours.
人们在门口等了两个小时后开始不耐烦了。
China has also taken steps to protect the students' eyesight, such as larger printing in students' textbooks, at least two hours' outdoor activities a day, regular eyesight checking, less time on E-books and so on.
中国也采取了措施来保护学生的视力，比如课本上印刷更大的字体、每天至少两个小时的户外活动、定期视力检查、减少看电子书的时间等。
Children in Britain can work two hours a day at the most on a school day but not during school hours.
在英国的上学日，除去上课时间，孩子们最多可以每天工作两小时。
Singapore's government is funding the experiment of the robotic dog, which will last for two weeks at the park during off-peak hours
新加坡政府出资支持机器狗的实验。该实验将在非高峰时段的公园每天进行两小时，为期两周。
Supposedly you can do it in two hours, but we stopped at the different gates and watchtowers to take pictures or just to watch the local people going about their daily routines.
按说两个小时就能走完城墙，但我们在不同的大门和瞭望塔上停下来拍照，或只是观察当地人的日常生活。
If the two-week experiment proves successful, the government will consider using Spot at the park during peak hours.
如果为期两周的实验结果是成功的话，政府将考虑在高峰时段在公园使用斯波特。
Her journey home first took her to Chengdu for two days and one night, she rested for a night at a hotel before spending another 14 hours on a train to Yuexi county, Liangshan.
她在回家的路上，先在成都停留了两天一夜，在一家酒店休息了一夜，然后又坐了14个小时的火车去往凉山越西县。
When Joe went to his new job, he got off on the wrong foot — on the first morning he upset his new boss by arriving at the store two hours late.
乔找到了一份新的工作，可是他刚开始到那家店里去上班时就给人一个坏印象。第一天上班他就晚到两个小时，让他的老板好不高兴。
Most people spend about half an hour at a time, and two hours total.
大多数人一次性花半小时，分四次共两个小时。
In most cases, reapply sunscreen at least every two hours while out in the sun.
通常情况下，在太阳底下每2小时需要涂抹一次防晒霜。
He wakes up every three hours — at eleven, two, and five.
他每三小时醒来一次。——11点、2点和5点各一次。
Our headmaster rattled on for at least two hours at the opening ceremony.
我们的校长在开学典礼上唠唠叨叨地讲了至少两个小时。
Our headmaster rattled on for at least two hours at the opening ceremony.
我们的校长在开学典礼上唠唠叨叨地讲了至少两个小时。
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