九年級作文帶翻譯air pollution
九年級作文帶翻譯airpollutionAirpollutionisoneofthemajorproblemsofthemodernworld.Agreatdealofenergyisneededtorunthefactoriesofmodernindustrialnations.Automobile,trains,planesandbussesneedenergy,too.Nearl...
九年級作文帶翻譯airpollutionAirpollutionisoneofthemajorproblemsofthemodernworld.Agreatdealofenergyisneededtorunthefactoriesofmodernindustrialnations.Automobile,trains,planesandbussesneedenergy,too.Nearl...