短語(yǔ)詞組短語(yǔ)back back out of 收回Back out of deal 退出交易back out of contract 不履行合同;背棄合同義務(wù)back out of sth 你答應(yīng)要去Back out of an obligation 推卸承擔(dān)的義務(wù)Back out of a fight 退出格斗back out of the contract 不履行合同;背離合同義務(wù)Back out of a danger 避開(kāi)危險(xiǎn)Pull out of back out 中止 返回 back out of