混凝土涵洞，雨水沟，排污沟系统的最低成本(使用周期)的标准规范。

Standard Practice for Least Cost (Life Cycle) Analysis of Concrete Culvert, Storm Sewer, and Sanitary Sewer Systems.

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在雨水沟与污水道分开的地方，街道雨水没经过处理并携带各种各样的废物，其中包括一些有机的和有毒的废品流人承接河道。

Where storm sewers are separated from sanitary sewers, runoff enters receiving waters untreated and can carry a variety of wastes, including organic and toxic wastes.

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圣诞节的饰物仍堆在商店橱窗里，积着飞尘，一丝丝雨水充被遗弃的常绿植物上滴下，落在水沟内，一闪一闪的。

Christmas decorations were still in some shop Windows, gathering dust, and tinsel rain from trashed evergreens glittered in the gutters.

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