其次则是“阿拉伯之春 ” ， 这是潜在积极分水岭，美国应该评估一下，为了追求积极结果，应该投入多少政治、经济和军事力量。
Then there is the “Arab Spring,” a potential positive watershed that calls upon the US to decide how deep a political, economic, and military commitment it ought to make to nurture positive results.