水渠可叫drainage, plumbing
webster dictionary:
http://www.webster.com/dictionary/plumbing
Main Entry: plumb·ing
Pronunciation: 'pl&-mi[ng]
Function: noun
3 a : the apparatus (as pipes and fixtures) concerned in the distribution and use of water in a building b : an internal system that resembles plumbing; especially : one consisting of conduits or channels for conveying fluids
污水渠可直接叫 sewer
Main Entry: sew.er
Pronunciation: 'sü-&r, 'sur
Function: noun
: an artificial usually subterranean conduit to carry off sewage and sometimes surface water (as from rainfall)
如果是養老鼠, 或真的用籠捉,可叫 rat cage
(see
http://www.qualitycage.com/rat.html)