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first-appearance datum 添加释义

网络释义专业释义英英释义

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... VERTICAL DATUM 高程基准面; 垂直基准; 高程基准 收藏 datum velocity 基准速度 收藏 first-appearance datum 首先出现基准面; 首现面 收藏 ...

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First appearance datum

  • abstract: First appearance datum is a term used by geologists and paleontologists to designate the first (oldest) appearance of a species in the geologic record. In other words, FADs represent the geologically oldest fossil of a particular species that has yet been discovered.

以上来源于: WordNet

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