defence system造句

1、Design of Active Network Security Defence System Model
主动式网络安全防御系统模型设计

2、The Conflict of Attack and Defence System Between TBM and ATBM
地地弹道导弹武器系统攻防体系对抗

3、A strong defence system offers protection from sudden attack by the enemy.
坚固的防御系统提供保护以防备敌人的突袭。