以下为句子列表：
英文: Abstract: This paper has expounded and proved the necessity and importanceof the investigation into element abundances and composition of the crustal surficial materials and, based on strict statistical analysis and calculation of the high-precision data
中文: 文摘:论证了中国丰度及地壳表层物质成分研究的必要性和重要性，利用区域地球化学勘查所提供的高精度分析数据，经严格统计计算，发表新疆地区及其一级构造单元表层岩石、岩屑、水系沉积物的39种元素背景平均值。
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英文: RAMESH R , RAMANATHAN A L , RAMESH S. Distribu2 tion of rare earth elements and heavy metals in the surficial sed2 iments of the Himalayan river system[J ] . Geochemical Jour2 nal , 2000 , 34 :2952319.
中文: 陈静生,王飞越,宋吉杰,等.中国东部河流沉积物中重金属含量与沉积物主要性质的关系[J].环境化学,1996,15(1):8214.
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英文: The geochemical examination of the sandstones and mudstones from the Xikang Group has led us to conclude that the debris are derived mostly from the surficial rocks and their overlying deposits on the Xikang-Yunnan ancient land, and tectonic settings disp
中文: 通过对西康群砂、泥岩地球化学组成特征研究，认为其物源来自康滇古陆表壳岩及其上覆的盖层沉积，大地构造属性为被动大陆边缘到活动大陆边缘再到多岛弧的转化。
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英文: This paper has expounded and proved the necessity and importance of the investigation into element abundances and composition of the crustal surficial materials and, based on strict statistical analysis and calculation of the high-precision data provided
中文: 摘要论证了中国丰度及地壳表层物质成分研究的必要性和重要性，利用区域地球化学勘查所提供的高精度分析数据，经严格统计计算，发表新疆地区及其一级构造单元表层岩石、岩屑、水系沉积物的39种元素背景平均值。
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英文: BIOTURBATION IN SURFICIAL SEDIMENTS OF SUBAQUEOUS CHANGJIANG (YANGTZE) RIVER DELTA
中文: 长江水下三角洲浅表沉积层中的生物扰动构造
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