下载掌阅APP，畅读海量书库
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1.have bought 已经购买
I have bought a new MP3 recently.
2.make sure 确信， 确保
All you have to do is to make sure which song you want.
3.click the button 点击按钮
Click the button and save the song to your computer.
4.pretty easy 相当简单
That sounds pretty easy,huh?
5.have a try oneself 自己试试看
I will have a try myself.