aqueduct

1. N-COUNT An aqueduct is a long bridge with many arches that carries a water supply or a canal over a valley. 高架渠; 渡槽; 桥管

...an old Roman aqueduct. ...一条古罗马时代的高架渠。

2. N-COUNT An aqueduct is a large pipe or canal that carries a water supply to a city or a farming area. 沟渠; 导水管

...a nationwide system of aqueducts to carry water to the arid parts of this country. ...一个将水输送到该国干旱地区的全国性输水系统。