Many aqueducts from ancient Roman times still stand today near the Mediterranean Sea.许多古罗马时代的引水渠至今还保留在地中海附近....a nationwide system of aqueducts to carry water to the arid parts of this country.将水输送到该国干旱地区的全国性导水系统Central ...
Many aqueducts from ancient Roman times still stand today near the Mediterranean Sea.许多古罗马时代的引水渠至今还保留在地中海附近.Hilly countries can be canalized by the construction of locks, tunnels, and bridge aqueducts.可以通过修筑闸门 、 隧道及高架引水道...