主要是因为俄罗斯依然拥有世界上最大的核武器库（虽有武器的年头有点老。 ） ， 同时在联合国安理会拥有常任理事国的席位（也就意味着拥有一票否决权。
Purely from the standpoint of economic potential and fundamentals, the case is far stronger for South Korea, a sophisticated economic power whose primary liability is the danger that the regime of its evil twin to the north will collapse and inundate it with hungry refugees.