alternate index upgrade

例句：

1. 1. The new software has an alternate indexing system that makes it faster and more efficient.
   新软件有一个交替索引系统，使其更快、更高效。
2. 2. This version of the software is designed to provide an alternate indexing upgrade for users.
   这款软件旨在为用户提供一种交替索引升级。
3. 3. The company is working on a project to improve the performance of its database by implementing an alternate indexing upgrade.
   该公司正在努力通过实施一种交替索引升级来提高其数据库的性能。