preloading centering

例句：

1. 1. The server needs to be preloaded with data before it can start processing requests.
   服务器在开始处理请求之前需要预先加载数据。
2. 2.During the installation process, the software is preloaded with all necessary drivers and updates.
   在安装过程中，软件会预先加载所有必要的驱动程序和更新。
3. 3. The engineers had to preload the system with a backup copy of the data before the upgrade was complete.
   工程师们在升级完成之前必须将系统预加载了数据的备份副本。