单语范例（未经PONS编辑处理）
To the right of the park is a stream which feeds into a sewer.
en.wikipedia.org Higher density developments such as condominiums and apartment buildings (approximately 10% of the town) use private sewers which go to small-scale private treatment plants.
en.wikipedia.org When constructed, combined sewer systems were typically sized to carry three to five times the average dry weather flows.
en.wikipedia.org Infrequently used plumbing fixtures may allow sewer gas to enter a home due to evaporation of water in the trap, especially in dry weather.
en.wikipedia.org Each of the large avenues had underground sewers which carried rain and refuse to the south of the city.
en.wikipedia.org