语音讲解：
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　　课文内容

　　(James and Sara are looking at CDs in a CD store.)

　　James: These CDs are so expensive!

　　Sara: I know. Have you heard of MP3?

　　James: Yeah. It’s a great way to listen to music from the Internet.

　　Sara: But you have to be careful.1 There are laws2 against using it illegally (非法地).

　　James: I know. You can only listen to the songs. You can’t save3 them onto your computer.

　　Sara: You can’t record (录音) them onto a CD, either.4

　　James: That’s right! You can get in big trouble for that!