Studies have shown that exercising for as little as ten minutes before handling a task can improve performance by increasing the flow of blood to the brain.
研究表明，在处理一项任务之前，只要锻炼十分钟，就可以通过增加流向大脑的血液量来提高工作效率。
Before the discovery of this site, it was commonly believed that central Asia had always been occupied by mostly nomadic people.
在发现这个遗址之前，人们普遍认为中亚一直以来主要是被游牧民族占据。
Initiatives also include efforts to reduce its environmental impact, water consumption and materials used in packaging by 2025.
这些措施还包括在2025年之前减少其对环境的影响、耗水量和包装材料的使用。
They are trying to make sure that 5G terminals will have been installed by 2022 for the Beijing Winter Olympics.
他们正努力确保在2022年北京冬奥会之前安装5G终端。
Before Mosaic, the web had been used mainly by scientists and other technical people, who were happy just to send and receive text.
在Mosaic 出现之前，使用万维网的主要是科学家和其他技术人员，他们只是发送和接收文本就很开心了。
Iraqi lawmakers are expected to vote on a security agreement by Wednesday, which will keep the US troops here until the end of 2011, the parliament's speaker said yesterday.
议会发言人昨日表示，伊拉克立法者预计将在周三之前就一项安全协议进行投票，该协议将使美军在伊拉克驻扎至2011年底。
Prior to the new study, little was known about the risks of getting directly infected by common respiratory viruses, such as the flu or common cold, on an airplane, the researchers said.
研究人员说，在这项新研究之前，人们对于在飞机上直接感染常见的呼吸道病毒，如流感或普通感冒的风险知之甚少。
Before the eruptions, it was covered by forests of pine trees.
在火山爆发之前，它被松树林所覆盖。
Before visiting senior men in the nursing home, we are told to be on our best behaviour by our teacher.
在去敬老院看望老人之前，我们的老师叮嘱我们要举止得体。
Before Allred knew it, New Mexico State Police Officers were among the many stopping by helping them reach a total of $568.
在奥尔雷德知晓这件事情之前，新墨西哥州的警官们和其他路过的好心人们已帮助她们筹集到共计568美金。
Undaunted, he remained south of the equator, keeping himself busy by studying the islands of Mauritius and Madagascar before setting off to observe the next transit in the Philippines.
他毫不气馁，继续留在赤道以南，在动身前往菲律宾观察下一个过境点之前，他一直忙于研究毛里求斯和马达加斯加群岛。
Scientists hope to build the space elevator by 2050.
科学家们希望在2050年之前建造太空电梯。
Cars powered by gasoline were sold for many years before hybrid vehicles that use gasoline, electricity, and solar energy. Car companies are now making cars that are fully powered by electricity only.
在使用汽油、电力和太阳能的混合动力汽车出现之前，汽油动力汽车已经销售了很多年。汽车公司现在正在生产完全由电力驱动的汽车。
At least until spring arrived, by which time they were dealing with damaging floods.
至少在春天到来之前，他们一直在处理洪灾。
Before visiting senior men in the nursing home, we were taught to be on our best behavior by our teacher.
在去敬老院看望老人之前，我们的老师教导我们要举止得体。
Scientists have long predicted that warmer temperatures caused by climate change will have the biggest influence on the world's poorest people.
科学家在很早之前就做出预测，受气候变化所导致的气温上升影响最大的群体将是世界上最贫困的人口。
By contrast, they saw in the preceding hundred years from 1650 to1750, when England was still a completely agricultural country.
相比之下，在1650年到1750年之前的几百年里，英国还完全是一个农业国家。
By anticipating "What if...?" situations before they happen, you can reach understanding that will help ease you out of confrontations.
你可以通过在事情发生之前设想“如果……会怎样”来理解它，这将有助于你从冲突中解脱出来。
The retractions follow a separate one, two years ago, of a paper by Dr. Buck that was published in the journal Nature in 2001.
本次撤回事件发生的两年之前，巴克博士已经撤回了一篇2001年发表在《自然》杂志上的论文。
They are made much worse by our willful blindness to risk as much as our reluctance to work together before everything goes to hell.
更糟糕的是，我们对风险的故意视而不见，以及不愿在一切变糟之前共同努力。
They say it could be reached by an unmanned spaceship before the end of the century in time for people alive today to see it.
他们说，在本世纪末之前，无人驾驶的宇宙飞船就能到达那里，让今天活着的人们及时看到它。
Savile Row was inhabited largely by surgeons before the tailors moved in during the 19th century, and tailors' influence can be seen in the surgeon's cuff.
在19世纪裁缝搬进来之前，萨维尔街的大部分居民是外科医生，裁缝的影响可以从外科医生的袖口看出来。
For the time before records began, we have only "proxy records" reconstructed largely from tree rings and ice cores, supplemented by a few incomplete written accounts.
在开始有记录之前，我们只有主要根据年轮和冰芯重建的“代理记录”，还有一些不完整的书面记录作为补充。
By 1996 foreign-born immigrants who had arrived before 1970 had a homeownership rate of 75.6 percent, higher than the 69.8 percent rate among native-born Americans.
截至1996年，生于国外并且在1970年之前到来的移民的房屋拥有率达到75.6%，比本地出生的美国人的房屋拥有率（69.8%）还要高。
By 1996 foreign-born immigrants who had arrived before 1970 had a homeownership rate of 75.6 percent, higher than the 69.8 percent rate among native-born Americans.
截至1996年，生于国外并且在1970年之前到来的移民的房屋拥有率达到75.6%，比本地出生的美国人的房屋拥有率（69.8%）还要高。
We are reminded of this even before we view a collection by the presence of security guards, attendants, ropes and display cases to keep us away from the exhibits.
甚至在我们参观藏品之前，保安、服务员、绳子和陈列柜都会提醒我们不要靠近展品。
Everyone has their own copy of the textbook supplied by the central education authority, Monbusho, as part of the concept of free compulsory education up to the age of 15.
作为免费义务教育理念的一部分，在15岁之前，每个人都有中央教育机构Monbusho 提供的教科书。
As you know, we've been looking at different kinds of art and craft that were practised by the Maori people of New Zealand—at least before the Europeans began to arrive in the 18th century.
如你所知，我们一直在研究新西兰毛利人所习惯做的不同种类的艺术和工艺——至少在18世纪欧洲人到来之前是这样。
It is preceded by the Barremian age and followed by the Albian age.
在它之前是巴雷米亚时代，之后是阿尔比安时代。
Some of these particles may not have been witnessed by scientists before.
其中的一些粒子在之前也许一直没有被科学家们观测到。
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