Form the necessity for establishing automatic command systems of important area, the status quo of important area air defense is analyzed.
从建立重点区域防空指挥自动化系统的必要性出发,分析了目前重点区域防空系统的现状。
John Collom was a British thinker on sea power and expert on imperial defense in the 19th century. He gave the first comprehensive exposition to the necessity and importance of Britain's defense.
约翰·科洛姆是19世纪英国的海权思想家和帝国防御问题专家,他首次全面阐述了英帝国防御的必要性和重要性。
In theory, people presently judge self-help of environmental infringement mainly according to the theories of traditional criminal law, legitimate defense in civil law and necessity.
目前理论界对于环境侵权自力救济的认定,主要适用传统刑法与民法正当防卫、紧急避险的构成理论。
They claimed they had acted out of necessity; that was their defense.
但他们声称此行为是迫不得已;,他们这样辩护。
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