adj.失望的,沮丧的;
v.提出要( bum的过去式和过去分词 );乞讨;使不安;使灰心;
例句:
I bummed around Europe for a year before university.
我在欧洲漫游了一年才上大学.
I am just a little bummed out.
我感到有一点失望.
You look kind of bummed out.
你看起来有点郁卒耶.