backpedal
verb [ I ] uk/ˈbækˌped.əl/ /ˌbækˈped.əl/ us/ˈbækˌped.əl/ /ˌbækˈped.əl/ -ll- or -l-
(BICYCLE)
倒踏自行车脚踏板
to move the pedals (= parts you operate with your feet) backwards on a bicycle
Some types of bike have brakes that you operate by backpedalling. 有些自行车通过倒蹬脚踏板刹车。
(CHANGE OPINION)
改变立场;出尔反尔;变卦
to change an opinion that you had expressed before, or do something different from what you had said you would do
As soon as I said I thought she was wrong, she started backpedalling. 我一说我觉得她错了，她就开始变卦。
He said he'd help, but now he's starting to backpedal (on his promise). 他说过会帮忙的，但现在开始变卦了。