讲解文本：
child's play 小儿科，非常简单的工作，轻而易举的事 Come on, this is like child's play. Even a baby can do this. 啊，这太简单了，一个baby都能搞定。 I finished the test very quickly. It was child's play! 我很快就完成了测试，太小儿科了。
疯狂练习吧！
