背弃( back-pedal的现在分词 );
Paul agreed to help but now he's back-pedalling because he says he's too busy.
保罗同意帮忙,可是他现在反悔了,因为他说他太忙了.
The government are back-pedalling on their election promises.
内阁正在背弃它竞选时的诺言。
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