A DVD burner and a blank DVD (If you're upgrading from Vista, you can skip burning a DVD).

一个DVD刻录机和一个空的DVD光盘(如果你是从Vista的系统上升级，你可以跳过刻录成dvd)。

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You have the option to align the titles to the left, center, or right of the page, and you can use the skip option to leave blank lines after each title.

您可以选择将标题与页的左边、居中或右边进行对齐，您可以使用skip选项在每个标题后保留空白行。

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We also check if a line is blank, and skip showing and numbering it if so. For example, combined with ls we can get

我们也会检查某一行是否为空，如果是空的话，则不进行显示和编号。

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