A search engine crawls a large set of pages efficiently in a small time frame to build its index.

搜索引擎在短时间内快速高效地搜索大量页面，以构建自己的索引。

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A search engine crawls a large set of pages efficiently in a small time frame to build its index.

搜索引擎在短时间内快速高效地搜索大量页面，以构建自己的索引。

youdao