embankment

详细解释:n. 堤防, 筑堤

英语解释：

名词 embankment:

a long artificial mound of stone or earth; built to hold back water or to support a road or as protection

例句：

A sewer or drain crossing under a road or embankment.涵洞横在公路或堤岸下面的下水道或排水管