28. A Successful Trade 成功的交易

It is lunch time. The kids go out to eat. They are excited and hungry. Paul has a ham sandwich. He does not like ham. He wants a tuna sandwich. Sarah has a tuna sandwich. She thinks tuna is smelly. She wants a ham sandwich. Paul and Sarah meet up. They trade their sandwiches. They get what they want.

现在是午餐时间。孩子们出去吃饭。他们既兴奋又饥饿。保罗有一个火腿三明治。他不喜欢火腿。他想要一个金枪鱼三明治。莎拉有一个金枪鱼三明治。她觉得金枪鱼很臭。她想要一个火腿三明治。保罗和莎拉见面了。他们交换三明治。他们得到了他们想要的。