“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	Growing Pains growing point growing season extension growing tip Growing up in Battle Growing Up in the War growing variety in musical theatre dance genres grow-out of the giant freshwater prawn Grow Rich growth growth ahead of allocation Growth and Development Appraise growth and development of infants and children growth associated protein growth axis growth centralism growth characteristic Growth Charts growth comparison growth condition growth cone growth control growth-coupled product synthesis growth curve growth curve model

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。