“key bed”的概念、定义、翻译、参考文献-科学参考

单词	key bed
释义	key bed [`kē ´bed] ^GEOLOGY 1. Also known as index bed; key horizon; marker bed. 2. A stratum or body of strata that has distinctive characteristics so that it can be easily identified. 3. A bed whose top or bottom is employed as a datum in the drawing of structure contour maps.
随便看	cluster aggregation cluster analysis optically pumped magnetometer optical mark reading optical maser optical mask optical material optical measurement optical memory optical meteor optical microscope optical mode optical model optical modulator optical molasses optical moment optical monochromator optical mouse optical null method optical oceanography optical parallax optical parametric amplification optical parametric oscillator optical path optical-path difference

科学参考收录了103327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。