?季节性河流
季节性河流 : billabong; ephemeral river; ephemeral ..
The ephemeral Tsauchab River flows nearby, but only during rainy periods.
CNN: Romancing the dune in Namibia
英汉双解词典包含3185865条英汉词条，基本涵盖了全部常用单词的翻译及用法，是英语学习的有利工具。