fair exchange

• 公平交换

fair exchange的用法和样例：

例句

1. Is five apples for five eggs a fair exchange?
   用五个苹果换五个鸡蛋公平吗?
2. I'll let you borrow my lawn mower if I can use your electric drill; after all, fair exchange is no robbery.
   如果我能用你的电钻，那我就借给你我的割草机，公平交换绝非强夺。