劍橋詞典a system or machine , for example a bicycle , that uses effort over a short distance to move a load through a longer distance 距離倍增器（通過近距離的作用實(shí)現(xiàn)負(fù)荷遠(yuǎn)距離移動(dòng)的機(jī)器或系統(tǒng)） 比較force multiplier 返回 distance multiplier