1.beyond question 毫无疑问
例句：His honesty is beyond question.
他的诚实无可怀疑。
2.beyond repair 不能修复
例句：I have to tell you that the machine is beyond repair.
我得告诉你,这机器没法修理了。
3.birth certificate 出生证明
例句：I have brought his birth certificate.
我带他的出生证来了。
4.birthday present 生日礼物
例句：Her father let her select her own birthday present.
她的父亲让她自己挑选生日礼品。
5.bit by bit 一点儿一点儿地，逐步地，慢慢地
例句：Let's finish this exercise bit by bit.
让我们一点点地把这个练习做完。
6.bits and pieces 零星碎片，七零八碎，零星
例句：I always have a lot of bits and pieces in my coat pocket.
我的大衣口袋里总是装着零七八碎的东西。