https://online2.tingclass.net/lesson/shi0529/0009/9907/505.mp3
https://image.tingclass.net/statics/js/2012
講解文本：
one and only 惟一的，僅有的，獨一無二的
For several years they've been each other's one and only.
這幾年來，他們都是彼此的唯一。
This is my one and only chance to do something.
這是我唯一的機會。
瘋狂練習(xí)吧!
