Though physicians and scientists understood there were numerous health hazards associated with the practice, the number of smokers increased dramatically in the first half of the 20th century.
虽然医生和科学家都明白，有无数危害健康的事情与合乎习俗的行为方式有关联，但在20世纪前50年，吸烟人数却戏剧性增加。
Just over half understood that there was something wrong with the funny endings, even though they couldn't always say just what.
只有超过一半的孩子能理解广告有趣的结尾存在着问题，尽管他们并不都能说出原由。
In the rich world the Labour force as it has traditionally been understood (those between 15 and 65) is expected to peak in 2010, at about half a billion people.
在发达国家，传统意义上的劳动力(年龄在15和65之间的)预期在2010年达到峰值，大约5亿人。
The fracture of thin/ultra-thin silicon dies accounts for half of the failures of IC cards, and its failure modes and failure mechanism are not well understood then.
薄/超薄芯片的碎裂占据IC卡早期失效的一半以上，其失效模式、失效机理亟待深入研究。
The fracture of thin/ultra-thin silicon dies accounts for half of the failures of IC cards, and its failure modes and failure mechanism are not well understood then.
薄/超薄芯片的碎裂占据IC卡早期失效的一半以上，其失效模式、失效机理亟待深入研究。
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