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.

虽然斯金纳想法是可，没有一个有羽毛战斗机飞员看到过动，因科学家们最终选择了基于线电回声定位系。

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

钢铁、火药、线电、全球定位系还是核武器，定义各个时代冲突，正是这些技术。