Soft hail, composed of particles resembling small snowballs, and formed by accretion when a snowflake falls through supercooled water droplets which freeze on contact and cover the flake.
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。