- back and forth来回,往返
- be able to能,会
- be about to即将
- be attached to使属于,使附属于
- be aware of知道,意识到,认识到
- be capable of能…,可能…
- be engaged in从事于,参加
- be familiar with对…熟悉
- be full of充满
- be good for对…有益
- be known as以……著称
- be used to doing习惯于……
- be useful to对…有益
- bear with宽容;耐心等待
- because of由于,因为
- before long不久以后
- break out爆发,发生 战争等)爆发;逃出
- break through突围,突破;重大突破,取得重大成果
- bring about导致,引起
- bring up养育,培养
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