be in the dark 蒙在鼓里
be on a diet正在節(jié)食
before long 不久,很快
behind the time(s)落后于時代
believe it or not信不信由你
bit by bit逐步的,慢慢的
break down 壞了,出故障
break up分手
by all means 當然
by and by很快
be sick/tired of 厭惡,厭倦
be up to勝任,能做
burn up 使憤怒
break new ground創(chuàng)新
be all ears 洗耳恭聽
be all eyes目不轉(zhuǎn)睛
by the book 照章辦事
below the mark不夠水平,不合格
be in another world 精神恍惚,魂不守舍
break the ice打破僵局,打破沉默
beyond the reach of sb.超出某人能力之外
Boys will be boys!本性難移
bite off more than I can chew 貪多嚼不爛
big potato大人物
burn a hole in one’s pocket 花錢如流水
break a leg大獲全勝