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mass extinction
释义
mass extinction
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。
Astronomy
mass extinction
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policy-based insurance
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policy experiment and policy promotion
policy for the construction of important agricultural production bases
policy for transformation of resource-based cities
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更新时间:2025/7/24 21:56:08