A large, star-shaped or pyramidal sand dune (a ‘sand mountain’) that may be 100–200 m high and that has been described for the Algerian Sahara. It may form where two zones of sand-laden wind cross one another. See draa.
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。