At the boot loader prompt, you can press the Tab key to see all of the available labels you can type to boot your machine.

在引导载入程序提示时，可按tab键查看可为引导机器而键入的全部可用标记。

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In other words, when two class loaders load different classes (that is, different bytecodes) with the same name, class loader constraints guarantee that there will be no type mismatch between them.

换句话说，当两个类装入器用相同的名称装入不同的类时(也就是不同的字节码)，类装入器约束保证了它们之间不会有类型不匹配。

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You should now type root (hd0, 0) (or your equivalent) to tell Grub which partition is being used to boot from, followed by setup (hd0) to reinstall the boot loader into the disk's master boot record.

现在键入root (hd 0, 0)(或者是你自己得到的返回值)，以告诉Grub该从哪个分区启动，然后键入setup (hd0)以在你的硬盘主引导记录重新安装引导程序。

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