“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	mutarotation mutase Mutation mutation mutational lag mutational spectrum mutation biosynthesis mutation breeding by radiation for fruit plant mutation breeding for fruit crops mutation effect mutation frequency mutation operator mutation pressure mutation rate mutation ratio mutations mutation testing mutation theory mutator gene mute Mutesa I muthmannite Muthusvami Dikshitar mu tight special standard process mu-tight special standard process

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