曾几何时我们只能沿边境区域集结坦克，现在却可以建设一套需要众多盟国贡献一系列高科技的复杂陆、海、空防御系统。
Where once we lined up tanks along borders, we are now building a complex system that requires a range of high-tech contributions from many allies – on land, at sea, and in the air.