We shall have to dig under the river to lay the sewage pipe.
为了铺设污水管道,我们必须在河床下面开一条通道。
During the year, the livestock waste control scheme prevented pollution equivalent to the raw sewage from 190000 people being discharged into the environment.
年内,禽畜废物管制计划减少的污染量,相当于19万名市民所产生未经处理的污水。
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