The US double standard on nuclear proliferation will make the road to the solution of Iranian nuclear crises more difficult,shake the international nonproliferation regime,and cause domino effect.

• 美国在核不扩散问题上的双重标准使伊朗核危机的解决更加困难，严重冲击了国际核不扩散体制，并将产生多米诺骨牌效应。