defense economy的意思|示意

And, are we engaged in a costly "arms race," one that imposes enormous costs for defense, costs that might end up bankrupting (yet again) our economy?

并且，我们人们是否参与到了一次代价昂贵的“军备竞赛”中，一次被迫付出巨大到足以再一次摧毁我们国家经济的代价来进行防卫的竞赛？

Due to its significance in the nowaday national economy, the network forms the main battlefields for the information security's attack and defense.

由于网络在当今世界国民经济中的重要性，网络也就成为信息安全攻防的主战场。

Underwater targets identification, which possesses a crucial application value to state economy and defense, is a very important topic in advanced country.

水下目标识别技术是世界各国十分重视的研究课题之一，在国民经济尤其在军事领域中，具有重要的应用价值。