noun 下载 🔗分享 干河床，wadi，溢洪道。 A valley, gully, or stream bed in northern Africa and southwest Asia that remains dry except during the rainy season. Examples : "During the rare desert rain, the dry wadis quickly fill with rushing water, transforming into temporary rivers. " 在沙漠里难得下雨的时候，那些干燥的干河床会迅速被洪水填满，变成临时的河流。 geography geology environment 与AI对话词汇游戏阅读练习
