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| 31. | Over the last 100 years, the global average temperature has increased by 1 F and many experts insist that this global warming is mostly due to human activities. |
| 过去的一百年里，地球平均气温上升了1华氏度，许多专家一致认为这种全球变暖主要是由于人类活动造成的。 |
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| -- 来源 -- 高中英语(高二下学期适用) 8 - Unit 22 Enviromental Protection Lesson 1 Global Warming |
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| 32. | Traditional Chinese medicial science think this illness major result of the hurt to seven emotions ,the irregular of diet,weak because of aged. |
| 中医学认为本病的发生主要是由于七情内伤，饮食不节，年老体衰等引起的。 |
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| 33. | The robin-sized murrelet is on the endangered-species lists in both Canada and the United States, primarily because logging is destroying its habitat. |
| 知更鸟大小的小海鸭已被加拿大和美国列入了濒危物种，这主要是由于伐木作业破坏了它们的栖息地。 |
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| 34. | These notable achievements of the past year can mainly be attributed to the following factors: A series of timely, resolute and correct decisions were made under the firm leadership of the CPC Central Committee with Comrade Jiang Zemin at its core. |
| 过去一年能够取得这样大的成绩，主要是由于以江泽民为核心的党中央的坚强领导； |
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| 35. | Large scale fish kills have been recorded in some Swedish lakes, and these have attributed to aluminium poisoning rather than to high acidity alone. |
| 记录表明，瑞典在某些湖泊之所以有大量鱼类死亡，主要是由于铝中毒，而不是因为酸度高。 |
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| 36. | She declined genetic testing for HD, principally out of concern fora relative who might have difficulty with employment or insurance. |
| 她拒绝接受亨廷顿病的遗传学检查，主要是由于担心会带来有就业及保险方面的困难。 |
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| 37. | Unwanted alarms, caused mainly by faulty automatic alarm systems or their poor positioning, contributed to about 53.9 per cent of the total number of fire calls. |
| 警钟误鸣约占火警召唤总数的53.9%，主要是由于自动警报系统失灵或安装位置欠佳而引致。 |
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| 38. | Table1 suggests that there is a steady increase in rice production and is mainly due to the strong effort of the government in the rice intensification program rather than by the expansion of agricultural area. |
| 表1表明，水稻总产量的稳定增加主要是由于政府贯彻的水稻集约化管理措施，而不是增加农业土地面积所致。 |
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| 39. | That is largely because China is fueling its growth with coal, a noxious source of CO2 and other pollutants. |
| 这主要是由于中国非常依赖煤来发展经济，而煤是一种含二氧化碳和其他污染物的有毒能源。 |
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| 40. | It is such a cycle that has led to widespread desertification in some parts of the world, primarily through overgrazing that can be compounded by naturally occurring droughts. |
| 这样的循环导致在世界的某些地方大范围的人为沙漠化，这主要是由于过度放牧并伴随着自然干旱的发生。 |
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