secondary indexing

• 副索引

secondary indexing的用法和样例：

例句

1. A secondary index in a pair of indexes used to locate a particular file record. The higher or mass index would often be considered the coarse index.
   用来查找特定文件记录的一对索引中的第二级索引。高一级的或涉及量大的索引通称为粗索引。