https://online2.tingclass.net/lesson/shi0529/0009/9907/100.mp3
https://image.tingclass.net/statics/js/2012
講解文本：
appetite 食欲，胃口，欲望
I have no appetite because I didn't sleep well last night.
我現(xiàn)在沒什么胃口，因為昨晚沒睡好。
Jack works hard, he has a big appetite for improving himself.
Jack工作很努力，他非常想要提升自己。
瘋狂練習(xí)吧!
