“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	absolutely simple absolutely simple algebra absolutely simple group absolutely stable absolutely stable solution absolutely stable system absolutely summable absolutely summable sequence absolutely summable series absolutely summing operator absolutely symmetric function absolutely taken absolutely unbiased sequence absolutely uniserial algebra absolutely unramified extension absolutely unramified ideal absolute magnetic permeability absolute magnetometer absolute magnitude absolute magnitude effect absolute magnitude scale absolute mass unit absolute maximum absolute maximum point absolute measurability

科学参考收录了854744条科技类词条，基本涵盖了常见科技类参考文献及英语词汇的翻译，是科学学习和研究的有利工具。