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首现点
释义
首现点
Encyclopedia
理学
生物地层带
释
first appearance datum
首现点
某一化石分类单元在地层中出现的第一个层位(薄层)。是生物面的一种。又称首现基准面。
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non-stable integrality theorem
non-stable star
non-stable theorem
nonstandard
non-standard analysis
nonstandard analysis
non-standard analysis; nonstandard analysis
non-standard architecture
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non-standard cosmology
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nonstandard function theory
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