[mass noun]the system of pipes, tanks, fittings, and other apparatus required for the water supply, heating, and sanitation in a building 管道设施,水暖设施 ■the work of installing and maintaining such a system 管道施工,管道工程,管道维修 ■(informal)used as a humorous euphemism for the excretory tracts and urinary system (非正式,幽默,婉)体内“管道”,排泄系统 I'd never discuss my plumbing with ladies. 我不会跟女士讨论我的体内“管道”。