https://online2.tingclass.net/lesson/shi0529/0009/9907/321.mp3
https://image.tingclass.net/statics/js/2012
講解文本：
child's play 小兒科，非常簡單的工作，輕而易舉的事
Come on, this is like child's play. Even a baby can do this.
啊，這太簡單了，一個baby都能搞定。
I finished the test very quickly. It was child's play!
我很快就完成了測試，太小兒科了。
瘋狂練習吧!
