偶尔留心军事航空技术,人们会注意到,飞机和导弹正大力而且十分秘密地朝着一个新的特性——隐身的方向发展。为了保密,美国禁止隐身计划的承包商在一般非密文件中使用“隐身”这一词,只允许使用“低 Occasionally paying attention to military aviation technology, one would notice that aircraft and missiles are stealthily and very secretive toward a new feature, stealth. For the sake of confidentiality, contractors that banned stealth projects in the United States use the term “stealth” in general non-secret documents and only allow "low