Speaking to reporters at the Pentagon, Secretary Gates said the U.S.intelligence community believes that Iran has been slower to develop its intercontinental ballistic missile capabilities than previously thought.

VOA: standard.2009.09.17

or try to develop a paradigm over which artificial intelligence might work,

或者试着建立一个可以运作人工智能的模式，

对于未来的技术 - SpeakingMax英语口语达人