索引suǒyǐnTop 15000Meanings1. indexCharacters used索to search引to drawExamples1我们wǒmen优化yōuhuà了le数据库shùjùkù索引suǒyǐn，结果jiéguǒ系统xìtǒng效率xiàolǜ提高tígāo了le50%。We have optimized the database indexing, and as a result, system efficiency has improved by 50%.