Sediment consisting of undecomposed, finely ground rock and insoluble material derived from weathered primary rocks; typical of clays, shales, and bauxites, with Al, Si, K, and Na as major components.
科学参考收录了60776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。