问题描述：
新概念二册58课中有一题：If you travel by air, you will gain time.
想问下为什么不能用earn? earn和gain的区别是什么?请别告诉我earn只能是赚钱：earn money.
想问下为什么不能用earn? earn和gain的区别是什么?请别告诉我earn只能是赚钱：earn money.
问题解答：
我来补答展开全文阅读