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Some are diplomats from nearby embassies. But many are citizens who have lived in America for decades.
VOA: standard.2010.03.18
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None of us have seen a case of smallpox, it hasn't existed in the world for many decades now.
我们没人见过天花,在这个世界上它已经被消灭几十年了
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You can keep people alive for many decades with periodic dialysis to remove waste products from the blood.
通过周期性的透析除去血液中的代谢废物,可以使病人寿命延长几十年
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The current job market for graduates is the worst in decades, and fellow student Hannah Sell said many marched out of a sense of anger.
VOA: standard.2009.03.28
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Instead, he's known for the development of an encompassing theory of mind, one that he developed over the span of many decades.
相反，他却因为提出了极具包容性的,心理理论而闻名天下，这个理论是他通过数十年的研究才提出的。
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U.N.children's agency in Somalia Deputy Representative Hannan Suleiman tells VOA that unlike countries like Yemen that may run out of water entirely in the next two decades, Somalia is thought to have plenty of water underground to sustain people for many generations.
VOA: standard.2009.10.06
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So now somebody can get an artificial hip and they can live for many decades with it and have almost full function of that hip over that period of time.
所以现在患者可以使用人造髋关节,再活上几十年,而且几乎和正常人没一点差别
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Then, also emphasizing in the case of smallpox, how even after the scientific discovery was made, it took many, many decades for people to be able to produce the vaccine in large enough quantities and distribute it, so that you could think about making an impact on global prevalence of the disease.
同时重点就天花疫苗的发展展开了讨论,而即便当科学发现了天花病毒,仍然过了许多年,人类才能够,大规模生产并使用天花疫苗,由此你们可以了解到,在全球范围内,疫苗给天花以致命一击
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Development of an artificial heart, again another example of Biomedical Engineering, is something that people have been trying to accomplish for decades now, and this is the closest that we've come and there are many advantages of this particular artificial heart.
人造心脏技术的发展,是生物医学工程的另一个例子,科学家们,试图在这二十年中去改进它,而这是最接近成功的一个实例,这枚人造心脏有很多优点
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