閱讀部份：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. 聽力部分：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，僅管錢花了，但至少還挺快樂。反正錢已經花了，幹 嘛不找一個自己舒服一點的方式呢？ 題目是解釋這個概念，用教授的例子來解釋。 這是我練jj遇到的問題 不知道該怎麼解釋 能請教各位神人應該怎麼說比較好嗎 謝謝！！ --

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