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palaeontology
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palaeontology
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理学
古生物学
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palaeontology
古生物学
研究地质历史时期生物的形态、构造、分类、生态、起源、分布、演化、灭绝等规律的学科。地质学和生物学交叉融合的产物。关心地球生命起源、演化特别是辐射演化与灭绝,特定地质事件的发生时限、规模、型式及背景机制,相关地层时代及其精确划分与对比等,一系列与基础理论和应用实践密切相关的重大科学问题。古生物学研究是人类回答地球生物圈来龙去脉的重要且不可或缺的途径。
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river and ocean combined transportation
river aquaculture
river bank
river bank collapse
river basin
river basins in China
river bed
river bed armoring
riverbed deformation
riverbed intake structure
riverbed with heterogeneous habitat structure
river biota
river bottom tunnel
river branching parameter
river canalization
river capture
river cascade hydropower development
river channel bed
river channel bed form
river channel self-adjustment
river channel strengthening engineering
river chart
river closure
river connectivity restoration
river corridor
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