Wlasnie czytam taki podrecznik do nauki angielskiego (z 1950r hehe jakims cudem znalazlem w sieci ) i jest taki tekst :
Other people teach his children in schools and take care ot them in hospitals when they are ill. Police and fire stations keep watch over his city. Lighting and water supplies, the clearing away of waste, the upkeep of steets and roads are all public services.
Wszystko rozumiem oprocz jednego Co oznacza upkeep w tym kontekscie .