走在世界上幾乎任何一個(gè)國(guó)家的街道上,你都可能會(huì)看到警察。他們幫助人們,保護(hù)他們的安全,他們幫助執(zhí)法,他們巡邏街道,他們控制人群。他們保護(hù)財(cái)產(chǎn),破案。?introduction?walk the streets of almost any country in the world, and you will probably see police officers. They help people and keep them safe, they help enforce laws, they patrol the streets, they control crowds. They protect property and they solve crimes.?