leap frog

柯林斯词典

1. N-UNCOUNT Leapfrog is a game which children play, in which a child bends over, while others jump over their back. 跳背遊戯
The kids were playing leapfrog and doing somersaults in the backyard. 孩子們正在後院玩跳背遊戯和繙筋頭。
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，美國的全部4套系統已經超越了歐洲的版本。