The highly optimized implementation decreases the customization flexibility of Lucene but provides a very fast indexing engine.

高度优化的实现降低了Lucene的自定义灵活性，但是提供了一个速度非常快的索引引擎。

youdao

An indexing engine, which defines the strategy to use for text analysis (the analyzer) and the index storage to use to record indexes.

索引引擎，用于定义文本分析(分析程序)所用的策略和用于记录索引的索引存储。

youdao

Next the document is sent to the Template object, which does the real indexing, using the indexing engine specified in the configuration file.

接下来，文档将发送给Template对象，由该对象使用在配置文件中指定的索引引擎执行实际索引。

youdao

That long tail includes about a hundred databases of specialized information that the search engine is now working on indexing, such as the Security and Exchange Commission's online filings and the online collection of medical journals known as PubMed.

FORBES: Magazine Article