back and forth(前后)來回地，反復地
back up支持;倒退
be able to能，會
be about to剛要，即將
be made up to由……組成，由……構成
be short of缺少，不足;未達到
bear…in mind記住(某事)
because of因為，由于
before long不久以后
beyond the question毫無疑問，確定無疑
both…and… 既……又……，不但……而且
break down損壞
break in破門(窗)而入;打斷，插嘴
break into強行闖進
break off中斷，中止
break out(戰(zhàn)爭等)爆發(fā);使逃脫，使逃走
break through突破，突圍
break up打碎;終止，結束
bring about帶來，引起，導致
bring forward提出(建議等)
bring into effect使生效，實行
bring out使……顯示出來;出版
bring up教育，培養(yǎng)
build up逐步建立;增強，增進
but for倘沒有，要不是
by accident偶然
by all means盡一切辦法，務必
by and by不久，遲早
by chance偶然，碰巧
by far……得多;最多
by means of用，憑借
by mistake錯誤地，無意中(做了某錯事)
by no means決不，并沒有
by oneself單獨地，獨自地
by the way順便地，附帶地說說
by way of經(jīng)過，經(jīng)由;通過……的方法
back up支持;倒退
be able to能，會
be about to剛要，即將
be made up to由……組成，由……構成
be short of缺少，不足;未達到
bear…in mind記住(某事)
because of因為，由于
before long不久以后
beyond the question毫無疑問，確定無疑
both…and… 既……又……，不但……而且
break down損壞
break in破門(窗)而入;打斷，插嘴
break into強行闖進
break off中斷，中止
break out(戰(zhàn)爭等)爆發(fā);使逃脫，使逃走
break through突破，突圍
break up打碎;終止，結束
bring about帶來，引起，導致
bring forward提出(建議等)
bring into effect使生效，實行
bring out使……顯示出來;出版
bring up教育，培養(yǎng)
build up逐步建立;增強，增進
but for倘沒有，要不是
by accident偶然
by all means盡一切辦法，務必
by and by不久，遲早
by chance偶然，碰巧
by far……得多;最多
by means of用，憑借
by mistake錯誤地，無意中(做了某錯事)
by no means決不，并沒有
by oneself單獨地，獨自地
by the way順便地，附帶地說說
by way of經(jīng)過，經(jīng)由;通過……的方法