Leapfrogged
v. 跳背, 交替前进, 跃过( leapfrog的过去式和过去分词 )
🗣️ 情景例句
I see. Is a credit card OK?
我明白了。用信用卡可以吗？
I have too much work to do to take time off for fun and games.
我工作多得没有游戏玩乐的时间。
when a significant number of people are living permanently in space.
如果有相当数量的人永久性地住在太空，