比较中俄两国相应的阻碍主要国际倡议的能力本身没有意义，但是这却是理解美国全球实力相对下降而直接导致的国际体系转变的有用工具。
Comparing the respective abilities of Russia and China to block key international initiatives makes no sense in itself, but it does constitute a useful tool for understanding the transformation of the international system that is now taking place as a direct consequence of the relative decline of America’s global power.