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I gave her a lift back out to her house.我讓她搭我的便車(chē)回家。Once you've given your word, don't try to back out.一旦許下諾言, 就不要想翻悔.We drove into a dead end and had to back out.我們把車(chē)子開(kāi)進(jìn)了一條死胡同,只得退出來(lái)....

不遵守（諾言、合約等），打退堂鼓...

back out的音標(biāo)：back out的英式發(fā)音音標(biāo)為：[b?k aut]back out的美式發(fā)音音標(biāo)為：[b?k a?t]...