She went off to bum round the world with a boyfriend.她动身和一个男友去周游世界了。She went off to bum around the world with a boyfriend.她和一个男朋友去漫游世界了。I think Steve managed to bum a lift home.我想史蒂夫是硬要搭人家的车回家的。I managed to bum the train fare off my dad.我设法从父亲那里要到了火车票钱。