阅读部份：sunk cost, which cannot be recovered after invested. People will continue their project even they know it won't be profitable if there is a sunk cost. 听力部分：You've already bought a ticket for a football game. But at that day, it was cold and raining. Besides, there will be live game on TV. But as you think you already paid for the expensive ticket, you would struggle to go out side to see the game. So you will get cold and wet. The ticket is the sunk cost. 如果你在家看呢，仅管钱花了，但至少还挺快乐。反正钱已经花了，干 嘛不找一个自己舒服一点的方式呢？ 题目是解释这个概念，用教授的例子来解释。 这是我练jj遇到的问题 不知道该怎麽解释 能请教各位神人应该怎麽说比较好吗 谢谢！！ --

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