But it has yet to build a strong defense system that can respond effectively either to regional contingencies or to global needs. What would be the strength of such a system if and when it is developed, and how will it compare with that of the US?
在经济产值上，如今的欧盟与美国并驾齐驱。但是欧盟尚未建立强大的防卫系统以有效地应付地区性紧急局势或者全球性需要。当这一系统建立之时，应该具有何种实力、以及如何与美国相比呢？