The control group was negative result during 20 years.
对照组历年来均为阴性。
He trekked around the world during 20 years His kind-hearted quality spread every corner around the world. Mr. Ni has donated more than 80 million yuan and 300 pieces of artistic works in all.
善行天下，二十多年来先生的爱心足迹踏遍了全国各地，累计捐出善款80余万，书画等艺术作品300来件。
Energy efficiency programs in California and Japan during the past 20 years have shown the remarkable gains that can be achieved with concerted effort, often at large savings to consumers.
在过去20年，加利福尼亚州和日本的提高能源效率的项目都表明，通过共同努力是能取得卓越成效的，这也往往让消费者节省很多金钱。
What if the person is someone who caused you extreme embarrassement during school 20 or 30 years ago?
如果那个人是在读书时另你非常不悦呢，而且已经事隔20、30年了？
During the past 20 years, Cai Wei never stopped self-study and most of his income was spent on books.
在过去的20年中，蔡伟从未停止过自学，他的大部分收入都用在买书上了。
The most dramatic increases took place during the past 20 years.
最剧烈的增加发生在过去20年。
In a word, during the period of 20 years the farmers' income had gone up rapidly.
总之，在这20年中，农民收入迅速增加。
Security has been an important factor for the enterprises during the last 20 years.
安全在过去的二十年中一直是企业的重要方面。
All four of the major carriers decided during the last three years to increase the pay-per-use price for messages to 20 cents from 10 cents.
4家主要运营商在过去的3年都决定把每用户的短信价格从10美分提高到20美分。
Over the whole planet, there will be a threefold increase in the average acidity of the oceans, which is unprecedented during the past 20 million years.
在整个地球，海洋平均酸度将增加三倍，这是在过去两千万年里从未发生过的。
During the past 20 years, slightly more than 1.5 million Chinese went abroad for study, mostly to pursue graduate degrees.
过去20年，中国留学生人数刚刚突破150万，而且攻读的大多是研究生学位，学成归国人数不足三分之一。
During the past 20 years, Christensen examined, tested and traveled with Peek.
在过去20年中，Christensen一直在为Peek做检查和测试，和他一起周游各地。
On top of that, the area has not burned for more than 20 years, during which time fuel built up.
更重要的是，这个区域已经20多年没有燃烧过了，肯定积攒了很多的可燃物。
'in effect, around 60 people would have to take the aspirin continuously for around 5 years to prevent one death from bowel cancer during a 20-year period,' he says.
实际上，在20年间约60人持续服用阿司匹林5年，才能预防一例因肠道癌死亡，他说，其明显的好处是能给需要决定是否服用阿司匹林的人提供不同的观点。
Its sharp-elbowed behaviour during the near-collapse of the euro earlier this year heightened concerns about Germany's role in the world that have been stirring ever since unification 20 years ago.
今年初当欧元接近崩溃时，德国很明显对此弃之不顾，这引起人们深深地担忧德国在世界上究竟扮演什么样的角色，自20年前两德统一后就一直令人激动不已。
Researchers studied subject histories and found that those who were securely attached to their caregivers during infancy were better at recovering from fights 20 years later.
研究者研究了这些被调查的国民的生平后发现那些在婴儿时期对抚养者的依恋很稳固的人20年后能够更好的从争吵中恢复过来。
Some scenic spots received no visitors for 20 consecutive days during and after the worst weather in 50 years, while many others suffered a dramatic drop in business.
在遭遇50年不遇的灾难后，有的景区已经连续20天没有游客光顾，还有的景区营业额大幅下跌。
Paying for all this care has now used up more than half of our joint savings, although I have estimated saving the state about half a million pounds during my 20 years of caring in retirement.
支付所有的护理保健费花去了我们俩人多一半的积蓄，尽管我曾估计我可以从20年退休金里省下五十万英磅。
While the number of people in nursing facilities in Kansas has dropped during the past 20 years, the number of people receiving services in their homes has increased.
过去的20年来，在堪萨斯接受机构护理的人数下降了，同时在家接受服务的人数增加了。
Germany's economy grew at its fastest pace in 20 years during the second quarter of this year, sparking better than expected overall growth for the 16 countries that use the euro currency.
德国经济今年第二季度出现20年来最快速的增长，带动使用欧元的16个国家的整体增长超过预期。
Just over 69% of the abstainers died during the 20 years, 60% of the heavy drinkers died and only 41% of moderate drinkers died.
在20年中，69%的不喝酒者死亡，60%的酗酒者死亡，只有41%的适量饮酒者死亡。
Through 2006, the three big Banks' average annual profits had grown at a roughly 20% clip during the past three years, according to data provider Capital IQ.
数据提供商CapitalIQ称，2004至2006年的三年中，三家大银行的平均年利润每年增长20%左右。
Over the longer term, prices are expected to remain higher than during the 1990s for the next 20 years.
从长远来看，今后20年价格预计将始终高于上世纪90年代。
During the last 20 years, we also implemented a lot of these new lean methodologies and processes.
在过去的20年，我们也同时执行了当中一些新的精益方法和流程。
Unlike other multi-drug resistant bugs reported during the last 20 years, NDM "brings several additional factors of deep concern for public health," said Nordmann.
不像过去二十年内报导的其他抗药性细菌，NDM“带来了几个（与其他抗药性细菌不同的）新因素，引起公共卫生方面的深重忧虑“。 Nordmann说道。
Ashtanga Vinyasa yoga became a very hip and trendy style of yoga during the past 20 years.
在过去…20年来八支串联瑜伽变成很受欢迎及流行趋势的瑜珈形式。
During the 20 years as an artists, how much you have managed to protect your private life?
在您20多年的艺人生涯里，您对自己的私生活能够维护多少？
During the 20 years as an artists, how much you have managed to protect your private life?
在您20多年的艺人生涯里，您对自己的私生活能够维护多少？
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