1. All summer vacation long they just bummed around. 整个暑假他们都是到处游荡。
2. This be an ancient topic, but has been bum is break up of of lover. 这是一个古老的话题，可是却一直游荡在分手的恋人之间。
3. You don't understand! I coulda had class. I coulda been a contender. I could've been somebody, instead of a bum, which is what I am. 你不明白！我其实可以有品味，可以成为一个有实力的竞争者，可以成为大人物而不是像我现在一样什么也不是！
英英解释
n.
1. a person who is deemed to be despicable or contemptible
2. a disreputable vagrant
3. person who does no work
4. the fleshy part of the human body that you sit on v.
1. ask for and get free; be a parasite
2. be lazy or idle adj.
1. of very poor quality; flimsy
