Radioactive ion beams with different decay modes and half-lives can be applied in many aspects of bio-medical fields.
不同衰变方式和半衰期的放射性核束在生物医学领域有不同应用。
The long half-lives of PCDDs, PCDFs and “dioxin-like” PCBs mean that each daily ingestion has a small or even a negligible effect on overall intake.
PCDF和“类二恶英”PCB的半衰期很长，意味着每天的摄入对总摄入量的影响很小甚至可忽略不计。
Factors influencing precise measurement of relative peak counting rates are discussed in time-series measurements over a dynamic range of 1000-fold radioactive intensities (10 half-lives).
对放射性强度跨越1000倍动态范围(10个半衰期)的跟踪测量中影响相对峰计数率精确测定的因素进行了讨论。
More than half the world's population lives in cities, the most light-polluted of which prevent even the Big Dipper from being seen.
超过半数的地球人口生活在城市，那些光污染最为严重的城市甚至连北斗七星也看不到。
Over half the world's population lives in urban areas, and this is expected to increase to 69 percent by 2050.
世界上有超过一半的人口生活在城市地区，这部分人口预计将在2050年增加到69%。
We now spend almost half (45 per cent) of our waking hours consuming media, as computers and the Internet have become ever more embedded in our lives.
我们现在把将近一半(45%)醒着的时间用在媒体上，电脑和互联网更是成为我们生活中不能缺少的一部分。
Current estimates suggest that half of all the living matter on Earth lives underground, at depths of up to 5km.
现在估计地球上大约一半的生物生活在地下深度约5千米以下的地方。
That urban growth—roughly half of humanity already lives in cities for the first time in recorded history—may lead to a big increase in greenhouse gas emissions.
有史以来，居住在城市里的人口粗略达到了整体人口的一半，这种城市扩张可能会导致温室气体排放的猛增。
Our promise to cut measles deaths by half and save hundreds of thousands of lives has not only been fulfilled, it has been surpassed in just six years with Africa leading the way.
仅仅六年时间，我们不但实现而且超越了将麻疹死亡人数减半并拯救成千上万人的生命的诺言，非洲尤其走在最前面。
More than half of the world's population lives in cities, with the urban poor constituting a growing proportion of urban dwellers.
超过一半的世界人口生活在城市，城市贫困人口在城市居民中的比重不断扩大。
Half the population of Kamchatka lives in the capital city, Petropavlovsk-Kamchatsky, founded by the Danish explorer Vitus Bering in 1740 and named after his twin ships, Saint Peter and Saint Paul.
勘察加有一半人口住在首府城市堪察加彼得罗巴甫洛夫斯克，这个城市是由丹麦探险家维特斯.伯宁于1740年建立，并以他两艘船的名字——圣彼得和圣保罗来命名。
More than half of women openly admit to regularly discussing theins and outs of their private lives with their friends.
超过一半的女性坦称她们常与朋友谈论自己的私人生活。
Smoking kills up to half of those who fail to quit puffing, reducing their lives by an average of 10 to 15 years.
高达半数吸烟人口死于这毒雾之中，吸烟者的人均寿命平均缩短10至15年。
More than half of women openly admit to regularly discussing theins and outs of their private lives with their friends。
超过一半的女性坦称她们常与朋友谈论自己的私人生活。
More than half of women openly admit to regularly discussing the ins and outs of their private lives with their friends。
超过一半的女性坦称她们常与朋友谈论自己的私人生活。
A study in Canada showed that as a last-ditch treatment for colorectal cancer, Erbitux lengthened lives by an average of about one and a half months compared with not treating the cancer at all.
加拿大的一项研究表明，作为结肠直肠癌的最后用药，与完全不治疗相比，俄比塔克斯(erbitux)可以延长患者平均一个半月的生命。
SLUM tourism has a long history - during the late 1800s, lines of wealthy New Yorkers snaked along the Bowery and through the Lower East Side to see "how the other half lives."
贫民窟旅游有着“悠久”的历史-在十九世纪末期，一队队的纽约富人就曾偷偷摸摸的沿着包厘街穿过下东区去观摩“另外一半是怎么生活的”。
Improving maternal health is key to saving the lives of more than half a million women who die as a result of complications from pregnancy and childbirth each year.
改善产妇保健是拯救每年因怀孕和分娩引起的并发症而死亡的50多万妇女生命的关键。
Today, more than half the world's population—about 3.3 billion people—lives in urban areas (7), including roughly 50,000 settlements of at least 50,000 people (8, 9).
当今世界超过一半的人（大约33亿）居住在城市。
We need to start thinking about the fact that half the population of the world lives on one or two dollars a day.
我们必须了解这样一个事实，那就是这世界将近一半的人口仍然每天只能依靠一到二美元来度日。
The unprecedented flooding in Pakistan in the latter half of 2010 disrupted the lives of 20 million people, but it also affected the country's arachnid population.
在2010年的下半年，史无前例的洪水袭击了巴基斯坦，夺去了两千万人的生命，也影响了这个国家蜘蛛的种群。
Vile indeed, but habit-forming and therefore lethally dangerous: it cuts short the lives of between a third and half of its practitioners.
吸烟有百害而无一利，但却容易成瘾，因此危害是致命的：吸烟者中三分之一到一半的人寿命缩短。
Vile indeed, but habit-forming and therefore lethally dangerous: it cuts short the lives of between a third and half of its practitioners.
吸烟有百害而无一利，但却容易成瘾，因此危害是致命的：吸烟者中三分之一到一半的人寿命缩短。
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