A measurement of the ratio of the horizontal extent of the stoss side of a ripple to the horizontal extent of the lee side. Wave ripples have ripple symmetry index values of less than 2.5, whereas current ripples have values of more than 3.0.
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。