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集群灭绝
释义
集群灭绝
Encyclopedia
理学
古生态学
释
mass extinction
集群灭绝
在一个相对短暂的地质时期内(通常不足100万年)及一个较广的地理范围内(通常是一个以上的地理大区),整个生态系统的多样性和个体数量出现突然的、异常的、大幅度的下降,甚至是遭受毁灭性的打击。
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Measures for the Punishment of Regulatory Violations in State Education Examinations
Measures for the Relief of Urban Vagrants and Beggars
Measures for the Supervision and Administration of the Quality and Safety of Food Production and Processing Enterprises (China)
measures in litigation conservatory
measures inscribed with the edict of the First Emperor
Measures of Criminal Attitudes and Associate
measures of disaster resistance and prevention
measures of macro adjustment and control
measures of public security administration
measures of R&D expenditures
measures of R&D personnel
measures of soil and water conservation for construction projects
Measures of the administration of food recall
Measures of the People's Republic of China for the Administration of The Examination and Approval of The Species and Quantity of Imported Terrestrial Wild Animals
Measures of the People's Republic of China on the Registration of Fishing Vessels
measures of water saving
Measures on Administration of Hazardous Wastes Business License
Measures on Reference Publications for Internal Use
Measures on Urban Administratiive Law Enforcement
measure space
Measures to Check the Sale of Prohibited Publications in Bookstores
measures to organize production safety in thermal power plants
measure the elements of occurrence
measure-theoretic ergodic theory
measure theory
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