leap frog

柯林斯詞典

1. N-UNCOUNT Leapfrog is a game which children play, in which a child bends over, while others jump over their back. 跳背游戲
The kids were playing leapfrog and doing somersaults in the backyard. 孩子們正在后院玩跳背游戲和翻筋頭。
2. V-T/V-I If one group of people leapfrogs into a particular position or leapfrogs someone else, they use the achievements of another person or group in order to make advances of their own. (利用別人成就) 超越
It is already obvious that all four American systems have leapfrogged over the European versions. 顯然，美國(guó)的全部4套系統(tǒng)已經(jīng)超越了歐洲的版本。