“first appearance datum”的概念、定义、翻译、参考文献-科学参考

单词	first appearance datum
释义	first appearance datum 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。
随便看	Three-Character Operetta Three-Charater Verse on Tuina Three Chivalrous Swordsmen by Ren Yi three-choice polygon three-choice walk three-chord lemma Three Chuanqi Plays of Wan Shu Three Chuanqi Stories of the Anxianglou Edition Three Chuanqi Stories of the Sturdy Grass Hall Three Circles three circles of information architecture three-circles theorem three close Three coining offices of shanglin three collections and five unified management three-colorable three-colorable graph three-colorable knot three-colorable map Three-color block-printed edition three-color photometry Three Colors:Blue, White, Red Three Colors of Xishuangbanna three-color theorem three-color tube

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