https://online2.tingclass.net/lesson/shi0529/0009/9907/285.mp3
https://image.tingclass.net/statics/js/2012
講解文本：
twenty-four seven 一天到晚，每時每刻，也寫作24/7
The supermarket is open twenty-four seven, so I can buy whatever I need whenever I want.
這家超市全年無休，所以我可以在任何時間買到我想要的東西。
They are still working twenty-four seven!
他們還是沒日沒夜的工作。
瘋狂練習吧!
