后者负责建立、管理和维护这里讨论的学习管理系统。
The latter is responsible for setting up, managing, and maintaining the learning management system discussed here.
每一个服务器上都运行爬网程序和建立维护操作的索引，这将增加系统资源的消耗。
The crawlers and index maintenance operations run on every server which increases system resources consumption.
归根到底，系统并不是一建立好就万事大吉了；它们必须要进行维护。
Ultimately, systems are not just built; they must be maintained.
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