lower mainly meaning in Chinese

下半身为主

Firstly this paper analyses the current security managements " of network management system problems and disadvantages , and it points out that their accuracy is very low mainly because of they detecting intrusions by only one characteristic of intrusions without considering the intrusions " effects
本文首先分析了目前的网管系统中的安全管理存在的缺点与问题，指出其主要缺点是利用单一证据来判断入侵，并不考虑入侵行为对网络的作用效果，从而造成误报率较高准确性较差。