求翻译：　　这几天，不少教练车车尾贴上了一张“CNG”标志，很多市民可能还不知道，这种是以天然气为燃料的轿车，逐步将在驾校车、巡逻车、环卫车等我市公共事业型汽车中推广。昨天，记者从市清洁汽车推广发展协调领导小组了解到，除了市公交公司运行的150台天然气公交车外，我市首批改装的290辆天然气教练车已驶上街头，今年将完成500辆公共事业型汽车“油改气”。是什么意思？

These days, many of the rear of the coach car labeled a "CNG" signs, many people may not know, this is a natural gas-fueled cars, gradually the driving school car, patrol cars, sanitation trucks and other I City public utility-type vehicle in the promotion. Yesterday, reporters from the city to prom

Over the past few days, many coaches truck stuck a "CNG" logo, a lot of people may not know that this is to use natural gas as fuel for cars, and step-by-step will be to drive school buses, patrol vehicles, sanitation vehicles, such as public utility type car in the city. Yesterday, this reporter le

　　These days, many driver training car tailstock has pasted on one “CNG” the symbol, very many residents possibly did not know, this kind is take the natural gas as the fuel passenger vehicle, in will gradually harness the school bus, the patrol car, the environmental sanitation vehicle waits for in

　　These days, many coach car car labeled a "CNG" signs, many people may not know, this is natural gas-fueled cars, gradually driving school vehicles, patrol cars, environmental sanitation vehicle, such as public utility-type automobile in the promotion of our city. Yesterday, the reporter learned fr

　　These days, many coach car car labeled a "CNG" signs, many people may not know, this is natural gas-fueled cars, gradually driving school vehicles, patrol cars, environmental sanitation vehicle, such as public utility-type automobile in the promotion of our city. Yesterday, the reporter learned fr