plumbing
/ˈplʌmɪŋ/noun
mass noun
1- the system of pipes, tanks, fittings, and other apparatus required for the water supply, heating, and sanitation in a building（建筑物内的）管道设施, 水暖卫生设施。
1.1
- the work of installing and maintaining such a system管道施工, 管道工程, 管道维修。
1.2
- 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”。