The cracking and lifting of soil material on a slope which occurs when shrunken clay, in rewetting, returns to its original volume, or through the growth and melting of ice crystals. See R. Charlton (2008).
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。