说服大国销毁核武器或许看上去就像让美国国会通过枪支管制法一样在政治上想入非非，但在这个问题上，奥巴马已经明确表示自己愿意尝试。
Convincing great powers to eliminate their nuclear arsenals might seem as politically fanciful as pushing gun-control legislation through the US Congress, but on that issue, too, Obama has made clear that he is willing to try.