请求免除：请求被免除参与某事。
请求推辞：请求或获得推辞参加某事的许可。
beg off //
动词 to ask to be released from an engagement, obligation, etc 请求解除(婚约、义务等)
ask for permission to be released from an engagement
同义词： excuse
... bed out移苗，移栽 beg off请求免除（责任或责罚） believe in①信奉，信仰②信任，相信，确信③支持，赞成 ...
... let off 放（炮、烟火等）... beg off 恳求免除(某种义务)... exculpation 使无罪 ...
... beg the question令人置疑 beg off推辞(已答应做的事)；反悔 lose ones heart(to sb.)倾心于(某人) ...
... beg the question令人置疑 beg off推辞(已答应做的事)；反悔 lose ones heart(to sb.)倾心于(某人) ...
请求免除
I'll have to beg off. I have another engagement.
恐怕我去不了了。我另有个约会。
Father told Tom to rake the soil level, but Tom tried to beg off.
父亲叫汤姆把土耙平，但汤姆设法求父亲别叫他干。
The night before the wedding, I decided to call my friends and beg off.
在婚礼前的晚上，我决定借故推辞我朋友的邀请。
The ambiguity of the proposition allowed me to treat it as an invitation for a drink and beg off.
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The Justice Department's lawyer, Mr. Buterman, said the contract provision all but assured publishers would beg off the wholesale model, to avoid having to match lower prices and absorb the margin loss.
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On her way to beg, Banafsha stops off at a center run by an Afghan nongovernmental organization called Aschiana -- the name means "nest" in Dari -- for a little education, a little recreation and a glimmer of hope.