魔鬼在细节里。 央视没提供细节， 不说明任何问题。
隐身机平时采用不隐身模式飞行是让你发现， 避免帮你的忙测试发现隐身机的方法。如果美军在公海例行飞行也采用隐身模式， 那潜在敌人就有机会试验各种反隐身技术。
反隐身技术将来总有一天会开发出来， 但美军不会帮你的忙。
As a matter of fact the vast majority of F-35 sorties are flown without stealth active. This is done by putting reflectors on the plane that send back an image on radar. The pilot can also generate electromagnetic signals that allow both military and commercial radars to pick-up and track the plane.
The main reason for not using stealth is so that potential enemies over time will develop an expectation of seeing a particular radar return pattern that they will come to identify as an F-35… and that’s what they will be looking-for. When the plane has to fly a mission that requires stealth, the reflectors are taken off and signal discipline is maintained and the odds of the plane being detected drop to near zero.
When you hear people say they can detect F-35s, the chances are they are detecting them with the reflectors out, and they don’t realise they cannot detect them when the plane is being flown in stealth mode.
谷歌翻译：
事实上，绝大多数F-35战机的飞行都是在没有隐身状态下进行的。这是通过在飞机上安装反射器将图像传回雷达来实现的。飞行员还可以发出电磁信号，使军用和商用雷达都能探测到并跟踪飞机。
不使用隐身技术的主要原因是，随着时间的推移，潜在的敌人会形成一种预期，认为特定的雷达回波模式会被识别为F-35……而这正是他们要寻找的。当飞机必须执行需要隐身的任务时，反射器就会被取下，信号规则也会得到维持，飞机被发现的概率就会降到接近零。
当你听到人们说他们可以探测到 F-35 时，他们是在反射器处于伸出状态时探测到的，而他们没有意识到当飞机处于隐身模式时他们无法探测到它们。
