“floor of coal seam”的概念、定义、翻译、参考文献-科学参考

单词	floor of coal seam
释义	floor of coal seam Encyclopedia 理学煤炭地质勘查释 floor of coal seam煤层底板在正常顺序的含煤岩系剖面中，直接伏于煤层下面的岩石。
随便看	existence criterion existence domain existence factors existence form of element existence limit of nucleus existence of best approximation existence of lift existence of required elements of crime existence precedes essence existence principle existence problem existence proof existence property existence region existence symbol existence theorem existence theorem for roots existential existential closure existential condition existential formula existential generalization existential illumination existentialism existentialism methodology of psychology

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。