VERB
變卦；出爾反爾；背棄諾言
If you say that someone back-pedals, you disapprove of their behaviour because they are not doing what they promised.
例句
She's backpedaled twice already...
她已經(jīng)兩次變卦了。
The cabinet may backpedal on these commitments.
內(nèi)閣可能背棄這些承諾。