Command 3 shows url_list.txt, a simple text catalog containing two URLs; Command 4 downloads the two URLs.

命令 3 显示了 url_list.txt 文件，简单的文本目录中包含了两个 URL；命令 4 则对这两个 URL 进行下载。

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The full-text index exceeds the limit for the number of rows that can be contained in a full-text catalog.

全文索引超过了全文目录中可以包含的行数限制。

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One full-text catalog can have several full-text indexes, but a full-text index can only be part of one full-text catalog.

一个全文目录可以包含多个全文索引，但一个全文索引只能用于构成一个全文目录。

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