The rate of flow of a fluid expressed as the number of moles per unit area per unit time. It is used for describing the flow of materials in terms of the transport of molecules or particles rather than bulk mass. The SI units are mol m−2 s−1.
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。