NORAD (North American Aerospace Defense Command) called me one night to say there' s a UFO coming up the California coastline.
秘密的指令“，他说，”北美空防联合司令部那天晚上给我来电话说，加利福尼亚沿海出现一个不明飞行物。Information from new radar also could potentially help the Lebanese Shiite militia Hezbollah with its missile arsenal and air defenses.
来自新雷达的情报也有可能潜在地帮助黎巴嫩什叶派和真主党民兵的导弹武库和空防。Its costly capabilities are intended to make it effective against the air defences of a sophisticated enemy, such as China.
其重金打造的性能意在令它能轻松突破高技术敌人（例如中国）的空防。NORAD brings together Defense Department and Canadian military assets to carry out air defense and maritime warning for North America.
NORAD负责为国防部和加拿大军队提供资金和设备，完成北美的空防和海上预警。In the ideological understanding, a concern is: after the opening of low-altitude airspace, air defense may be a challenge to security.
在思想认识上，一种担心是：低空空域放开后，可能会对空防安全形成挑战。I do not think the German Air Force has the numbers or quality to overpower our air defences.
我不认为德国空军在数量和质量上能击溃我们的空防。The fact, however, remains that, though seemingly a big military power, she is far from invulnerable in her air defence.
然而，现实情况仍旧是，虽然她貌似一个军事强国，她的空防却远不是无懈可击的。Territorial air security is an important constituent of overall national security.
空防安全是国家总体安全的重要组成部分。The fact, however, remains that, though seeming a big military power, she is far from invulnerable in her air defense.
然而，现实情况仍然是，虽然她貌似一个军事强国，但是她的空防远非无懈可击。