beg off

To ask to be released from something, such as an obligation

借故推辞，谢绝：要求从某件事，如一项义务解脱出来

We were invited to stay for dinner, but we had to beg off.

我们被邀请留下来吃晚饭，但我们不得不谢绝了

beg one's bread

(archaic)live by begging

(古)以乞讨为生

beg the question

(of a fact or action) raise a question or point that has not been dealt with; invite an obvious question

（事实或行动）引发（人们考虑）尚未触及的问题；引出多数人都能想得到的问题

assume the truth of an argument or proposition to be proved, without arguing it

未经讨论就认为某一有待证明的论点或主张正确；把尚无定论（或有待证明）的事当作事实来看待；想当然，主观臆断，武断

beg to differ

beg yours

(Austral./NZ)I beg your pardon

(澳/新西兰)对不起；请原谅

go begging

(of an article) be available for use because unwanted by others

（物品因别人不需要）随时可用