They have gaps in them where they cross little natural drainage channels and the lines themselves are not perfectly filled in, with lots of little streaks and uneven coverage.
他说:“网格中有一些间隙,在这些间隙里交叉着很小的自然排水渠道,而这些线条本身却没有完全被充填,有着许多小的条纹和不均匀的覆盖范围。”
The rush of water downed utility lines, broke underground drainage pipes and flipped cars that remain Mired in mud.
急流瘫痪了公用线路,冲破地下排水管道,弄翻陷入泥坑的汽车。
The whole city drainage system program is as follows: rain water wells road, clay and drain well across the street and drainage inspection wells and underground drainage main lines.
市政整体排水系统程序如下:路面雨水→雨水井→沉泥井→过街排水管→排水检查井→地下排水主干线。
The whole city drainage system program is as follows: rain water wells road, clay and drain well across the street and drainage inspection wells and underground drainage main lines.
市政整体排水系统程序如下:路面雨水→雨水井→沉泥井→过街排水管→排水检查井→地下排水主干线。
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