制导系统失灵了，所以导弹没能命中目标。
The guidance systems didn't work and the missile couldn't hit its target.
当然不仅海上可以发射这些导弹，其他的超级精确制导系统，比如某些悬挂在F15E战鹰攻击机上的制导导弹（GBU），通过激光和尾翼制导。
Destruction doesn't only come from the sea, either. Other super accurate systems, like certain Guided Bomb Units (GBU) carried on F15E Strike Eagle planes, use lasers and fins for guidance.
一般认为中国DF-21弹道导弹已经装备一枚高爆弹头和一套能在海上寻找并且击中一艘航空母舰的制导系统。
The general idea is that the Chinese DF-21 ballistic missile has been equipped with a high-explosive warhead and a guidance system that can find and hit a aircraft carrier at sea.
文中在圆判据非线性稳定性理论基础上，进行空空导弹变结构制导系统的稳定性分析。
The stability analysis of variable structure guidance system of an air-to-air missile was conducted based on the circle criterion nonlinear stability analysis theory.
文中在圆判据非线性稳定性理论基础上，进行空空导弹变结构制导系统的稳定性分析。
The stability analysis of variable structure guidance system of an air-to-air missile was conducted based on the circle criterion nonlinear stability analysis theory.
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