If using iTunes 7 or earlier, you'll need to go to the "Advanced" tab before being able to access "Import Settings." If using iTunes 8 or later, going to "Preferences" will automatically direct you to the page where you can find "Advanced." " Next to "Setting," choose either 128 kbps, 160 kbps, or 192 kbps. If you want a custom setting, click on "Custom..." and select choices for Stereo Bit Rate, Sample Rate, and Channels. Under most circumstances, you want your channel set to "Stereo."    Depending on your version of iTunes, do this either by:  With the file(s) selected, navigate to the "Advanced" tab and choose Create MP3 Version. Simply right-click the file and click "Create MP3 Version."

How would you rephrase that briefly using Chinese?
打开iTunes。 点击iTunes →参数选择→ 导入设置。 将“导入使用”设置为“MP3编码器”。 选择设置参数。 点击“是”来退出导入设置窗口。 点击“是”来关闭常规设置窗口。 选择你的iTunes库中的一个或多个wav格式文件。 新建一个MP3格式版本的文件。