柯林斯词典flash flood (flash floods) 1. N-COUNT A flash flood is a sudden rush of water over dry land, usually caused by a great deal of rain. 驟發洪水 返回 flash flood剑桥词典a sudden and severe flood 驟發的洪水，暴洪 The unusually heavy rain caused flash floods in several mountain villages . 罕見的大暴雨導致幾処山村驟發洪水。 返回 flash flood