The Pentagon’s costly fleet of F-35 fighter jets can only fly a little over half the time, as maintenance issues keep the aircraft on the ground despite the growing reliance on the planes by the US and its allies.
五角大楼耗资巨大的F-35战斗机机队的任务执行率仅略高于50%,尽管美国及其盟国对这些飞机的依赖与日俱增,但由于维护问题,这些飞机一直停在地面上。
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