踏板使用法；踏板法...

n.踏板，脚蹬子，垂足线vt.& vi.踩自行车的踏板，骑自行车...

v.改变主意，变卦，背弃诺言( backpedal的现在分词 )...

vi.改变主意，变卦，背弃诺言...

She's backpedaled twice already.她已经两次变卦了。He backpedaled for the sake of braking his bicycle.他为了使脚踏车停下来而反踩踏板....

She climbed on her bike with a feeling of pride and pedalled the five miles home...她自豪地骑上自行车，蹬了5英里路回家。He pedalled furiously up the hill.他猛踩踏板向山上骑去.Allen back-pedalled, saying that he had had no intention of offending the...

pedals的音标：pedals的英式发音音标为：['pedlz]pedals的美式发音音标为：['pedlz]...

backpedal的现在完成时为：backpedaled...