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古生物学
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古生物学
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古生物学
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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。
Biology
palaeobiology
古生物学
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improper subspace
improper symbol
improper symmetry operation
improper transformation
impropertransposition
improper valuation
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improved artificial whiskers
improved confinement mode
improved finite element
improved grassland
improved Lorentz-Savona industrial evolution model
Improved Lunar Ephemeris
improved opera costumes
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improved seed subsidy
improved triploid hybrids derived from female improvedCarassius auratus red var. x male improvedtetraploid hybrids of Carassius auratus red var. x Cyprinus carpio
improved value
improved variety farm
improve industrial quality and efficiency
improvement
Improvement and Rectification
improvement history of livestock and poultry
improvement of microbial strains by plasma
improvement of orbit
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