Unverified50% confidenceFactExact time
倒排索引是搜索引擎核心数据结构，建立从词到文档的映射关系，使关键词检索时间复杂度接近O(1)
1
Sources
50%
Confidence
Long-term
Relevance
8/20/2026
First Seen
Sources
Related Claims
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