韩联社，韩国的新闻通讯社，则援引匿名的情报来源说，这架飞机看上去属于前苏联时期的军用喷气战斗机，其飞行员可能尝试叛逃。
Yonhap, the South Korean news agency, citing unnamed intelligence sources, said that the plane appeared to be a Soviet-era military jet and that the pilot might have been trying to defect.
飞机战斗生存力已成为军用飞机设计的主要指标之一，飞机易损性研究的目的是揭示提高飞机战斗生存力的途径。
Aircraft combat survivability has become one of the main indexes in military aircraft design. The goal of studying aircraft vulnerability is to discover how to increase the aircraft survivability.
飞机战斗生存力已成为军用飞机设计的主要指标之一，飞机易损性研究的目的是揭示提高飞机战斗生存力的途径。
Aircraft combat survivability has become one of the main indexes in military aircraft design. The goal of studying aircraft vulnerability is to discover how to increase the aircraft survivability.
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