渡槽，也叫高架水渠，通常架设于山谷、洼地、河流之上，用于通水、通行和通航。
Aqueduct, also called elevated canal, is usually built over valley, lower land or river for conducting water from a distance or even for shipping.
政府正在计划投资几十亿建一个由水渠、水管和高架水道构成的系统，将水从潮湿的南方转调到干旱的北方。
The government is planning to invest billions in a system of canals, pipelines and aqueducts to divert water from the soggy south to the parched north.
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