leapfrogging
跳背法
leapfrogging
跳位
leapfrog
n 1: advancing as if in the game of leapfrog
2: a game in which one child bends down and another leaps over
v 1: jump across; "He leapfrogged his classmates"
2: progress by large jumps instead of small increments
[also: leapfrogging, leapfrogged]