以下为句子列表：
英文: A survey has been carried out of soil erosion in the black soil area at the east piedmont of the Great Xingan Mountains in Hulunbuir, by making use of satellite remote sensing data available and findings of the national survey of soil fertility and assess
中文: 摘要利用卫星遥感资料结合全国耕地地力调查与质量评价项目的实施，在内蒙古呼伦贝尔市大兴安岭东麓低山丘陵黑土区进行了土壤侵蚀现状调查研究，摸清了该地区土壤侵蚀现状。
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英文: Abstract: Characterized by vast coverage and extra intensity, soil erosion in the Upper Yangtze River Valley has become an important indicator of the ecological and environmental deterioration in the region.
中文: 文摘:长江上游水土流失面积广，侵蚀强度大，是其生态环境退化的重要标志。
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英文: Abstract: The traditional catalyst used in acetal(ketal) synthetic reaction is strong inorganic acid.But there is some limits to its use because of its side reaction,strong erosion and liability to pollute the environment.Molybdophosphoric acid is used as
中文: 文摘:缩醛(酮)合成反应的传统催化剂为无机强酸，但由于副反应多、腐蚀性强和易污染环境等缺点，其使用受到限制.用磷钼酸为催化剂，通过醛(酮)与乙二醇直接反应得到了三种缩合产物.对影响反应的诸因素进行研究,结果表明，用磷钼酸作催化剂，用量小，活性高，产品收率较高，且重复使用性能较好.
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英文: Add to that data from transmitters on fish, such as tuna, and scientists could gain new understandings into El Nino storms, polluted runoff, beach erosion and wildlife.
中文: 再借助于装在金枪鱼等鱼儿身上的发射器，科学家便能对厄尔尼诺现象、径流污染、海岸沿线水土流失以及野生动植物有更深入的了解。
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英文: Along with advance by sedimentation on the whole, there is alsoerosion backward in the Yellow River del-ta.
中文: 黄河三角洲在整体淤进的同时伴随着蚀退。
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