ravinen. 峽谷、沖溝、溪谷學術名詞溝壑:地球科學、地質學溝谷:地理學山澗:測量學雨裂:測量學峽谷:水利工程學匯集槽:水利工程學英文釋義a deep narrow steep-sided valley (especially one formed by running water)