Leapfrogged
v. 跳背, 交替前进, 跃过( leapfrog的过去式和过去分词 )
🗣️ 情景例句
Come on in.
请进。
I'm twenty-one years old.
我21岁。
As he hated army life, he decided to desert his regiment.
他讨厌军旅生活，决定逃离所在部队。