269. Unfortunately , available evidence fails to establish any direct link between smoking and cancer .
不幸的是,现有的证据不能证明抽烟和癌症之间有直接的联系。
270. Fortunately , mountains of reliable evidence proves the direct link between smoking and cancer beyond any shadow of the doubt .
庆幸的是,大量可靠的证据证明抽烟和癌症有直接联系是毫无疑问的。
271. Television violence has contributed directly to rising crime , as evidenced by statistics showing a dramatic rise in copycat crimes .
数据显示模仿的犯罪行为有大幅度的增加,这证明电视暴力是犯罪增加的一部分直接原因。
272. The introduction of adcance agronomic techniques has contributed greatly to the development of agriculture , as indicated by statistics showing increased output in each of the past five years .
数据显示在过去的五年中,每一年的产量都有提高,这表明发达的农业技术的引入对农业发展起到了很大的作用。
273. While it may appear that the gap between rich and poor people is narrowing somewhat , recently released evidence suggests that the opposite is true .
贫富之间的差距看似有一定的缩小,但是最近发布的证据表明事实正好相反。
274. While attaining world peace remains within the realm of possibility , the prevailing trend revolves around regional conflicts and internal strife in many countries .
获得世界和平是有可能的,但是普遍的趋势是存在地区冲突和许多国家内部的斗争。
275. Although statistics are quite often far less reliable than one might wish , other reliable information allows one to closely approximate industrial output figures .
尽管数据经常比人们希望的不可靠得多,但是,其他可靠的信息使人们能得到接近工业产量的数字。
276. Although random sampling used for many surveys fails to cover large segments of the population , the procedure nonetheless offers insight into voting and consumption patterns .
虽然许多调查所用的随机取样不能覆盖大部分人口,但是这一过程使人们能更深刻地理解选举和消费的模式。
277. The need for more government services has proved to be the case time and again .
事实多次证明需要更多的政府服务工作。
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