Never pipe the discharge line directly into a drainage ditch, sewer or sump.
不要把排泄管直接插入排泄地漏、污水管或污水坑里。
One could no more find one's bearings in the sewer than one could understand one's position in the city;
人们在阴沟里辨不出方向,在城市中意见也不能一致;
A small proportion of the streets were sewered.
一小部分街道铺有下水道。
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