| 例句 |
ductnoun a long hollow cylinder for carrying a substance (as a liquid or gas)air ducts to provide ventilation channel, conduit, leader, line, penstock, pipe, trough, tube drain, drainpipe, funnel, hydrant, main, smokestack, spout, standpipe, stovepipe, tile, waste pipe, waterspoutpipage(or pipeage), pipeline, piping in 1667 |