While Skinner's idea was feasible, none of the feathered fighter pilots ever saw  action, as the scientists ultimately went with a radio-based echolocation system instead.

虽然斯金纳的想法可行的，但没有一个有羽毛的战斗机飞行员看到过行动，因科学家们最终选择了基于无线电的回声定位系。

It is technology, whether steel, gunpowder, radio, GPS, or nuclear weapons, which have defined conflicts over the eras.

无论钢铁、火药、无线电、全球定位系核武器，定义各个时代冲突的，正这些技术。