During the winter months, great flocks of gulls gather at landfills and sewage outfalls.

冬季时大群大群的海鸥会聚集在垃圾场和排污口。

The outfall of Wangjiagang oil producing wastewater disposal plant was the worst in the five outfalls of Shengli oil filed.

首站污水排放口是胜利油田五个外排口中水质最恶劣的一个口。

As industrial chemicals came into common use, they, too, were washed into the sewage system, and out again into the sewage plant outfalls.

随着工业化学物质的普遍应用，他们也被冲进下水管道，并再次进入污水处理厂排污口。