https://online2.tingclass.net/lesson/shi0529/0009/9907/193.mp3
https://image.tingclass.net/statics/js/2012
講解文本：
big deal 重要的事
Don't worry, It's no big deal.
別擔(dān)心，這沒什么大不了的。
It's really a big deal, you better think twice.
這件事真的很重要，你要想好。
瘋狂練習(xí)吧!
