https://online2.tingclass.net/lesson/shi0529/0009/9884/71.mp3
https://image.tingclass.net/statics/js/2012
on purpose 故意地
例句：
I'm sorry, I didn't do it on purpose.
对不起，我不是故意这么做的。
You smashed my watch on purpose.
你故意把我手表打碎了。
A：I failed my exam, that's good.
我考试不及格，真是太棒了。
B:Wait, you did it on purpose, that's stupid.
等一下，你故意这么做的，你真是太愚蠢了。
背景音乐：
StarGate——Eaise Said Than Done
