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When talking about the hero， people will think about the person who saves the world， such as superman and batman， they care about the public’s lives and interest all the time. In the real life， people believe that a hero at least can make great influence to the society， like the scientist. But in my opinion， some true heroes are easy ignored， they are doing the ordinary jobs while making great contribution to the society. The city cleaners are the classic ones， they beautify the city and bring comfort to the public. Though they are nobody， they are doing the great job. They are heroes and should be praised.