这一警报是由北极地区史无前例的事件所引发的。
纽约市的大型快餐连锁店已经开始遵守史无前例的规定，也就是在菜单上标明卡路里计数。
Big fast-food chains in New York City have started to obey a first of its kind rule, requiring them to post calorie counts right on the menu.
纽约市的大型快餐连锁店迎来了一项史无前例的新规定，这一规定要求他们在菜单上附上卡路里含量表。
Big fast-food chains in New York City have started to obey a first-of-its-kind rule, requiring them to post calorie counts right on the menu.
这将是史无前例的壮举。
也许唯一安全的预计是无前例的人口转移。
Maybe the only safe prediction is for unprecedented population shifts.
人类同样以史无前例的方式来面对这一疾病。
And humanity has faced this disease, in equally unprecedented ways.
旧房销售量的骤降是严重的但是并不是史无前例的。
The plunge in sales of existing homes is severe but not unprecedented.
达文认为，各州的行动规模之大，都是史无前例的。
Ms Dalven thinks that the scale of the states' actions is unprecedented.
重建这些急需的基础设施的实际任务是一个史无前例的挑战。
The actual task of building back this critical infrastructure is a challenge of unprecedented proportions.
首先，很多大学毕业生的负债额是显著的而且是史无前例的。
First, the amount of indebtedness many graduates have is pronounced and unprecedented.
“过去五到六年间我们见证的是史无前例的财富转移，”他说。
"What we have witnessed over the past five to six years has been nothing short of a historically unprecedented transfer of wealth," he said.
所以，一个史无前例的决定出来了——修复飞机，让它重新起飞。
So an unprecedented decision has been made - to restore the plane and make it fly again.
所以，一个史无前例的决定出来了——修复飞机，让它重新起飞。
So, an unprecedented decision has been made - to restore the plane and make it fly again.
至少，保尔森史无前例的行为解除了一个一直可能随时爆炸的危机。
At the very least, Paulson's unprecedented move defuses one ticking time bomb.
严重急性呼吸道综合征和禽流感等新疾病正在以史无前例的速度出现。
New diseases, like SARS, like avian influenza, are emerging at an historically unprecedented rate.
我们还向抗击艾滋病、结核病和疟疾全球基金作出了史无前例的数年认捐。
We have also made an unprecedented multi-year pledge to the Global Fund to Fight AIDS, Tuberculosis and Malaria.
2007年，史无前例的野火肆虐希腊全国，几乎摧毁了古奥林匹亚遗址。
In 2007, unprecedented wildfires raged across Greece, nearly destroying the ancient site of Olympia.
越南通过实弹演习和发布军事条令做出了史无前例的尖锐反应，他补充道。
Vietnam had reacted with unprecedented stridency by holding the live-fire drill and issuing a decree on the terms of military service, he added.
然后，这些企业回到自己的研发团队，打造出新产品和史无前例的价格水平。
Then the companies are going back to their research teams and crafting new products and unprecedented price points.
这引发了重要的科学和社会学议题：我们现在有了史无前例的机会去认识生命。
It raises important scientific and societal issues: we now have an unprecedented opportunity to learn about life.
那次危机也引发了史无前例的大规模囤积外汇以防止未来再碰上国际收支问题。
It marked the start of an unprecedented build-up of foreign exchange to insure against future balance-of-payments problems.
由于担心油门可能会被卡住，丰田公司史无前例的在美国停止了8款车型的销售。
Toyota took the unprecedented step of halting the sale of eight of its models in America because of concerns that the accelerator pedal can become stuck.
随着史无前例的人口激增，化石燃料的消耗与温室气体的排放也达到了历史上的最高水平。
The unprecedented increase in human Numbers is paralleled by the highest levels of fossil fuel consumption and greenhouse gas production in history.
国家气象局称，在加州热浪炙烤下，洛杉矶市中心达到史无前例的华氏113度。
The National Weather Service says downtown Los Angeles has recorded an all-time record high of 113 degrees as a heat wave bakes California. AP / Richard Vogel
关于宇宙诞生的最流行的理论的核心的部分是一次史无前例的宇宙巨变——大爆炸。
The most popular theory of our universe's origin centers on a cosmic cataclysm unmatched in all of history—the big bang.
“大衰退”这个术语我向来是不喜欢的，这不是一个普通的衰退，更不是史无前例的一个。
I never liked the term "the great recession," because this is not an ordinary recession, not even a great one.
“大衰退”这个术语我向来是不喜欢的，这不是一个普通的衰退，更不是史无前例的一个。
I never liked the term "the great recession," because this is not an ordinary recession, not even a great one.
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