The key factors of success is not intelligence, but a psychological factor, or non-intelligence factors.

决定成功的因素并不是智力，而是心理因素，或者叫非智力因素。

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Another factor is that the United States has not developed the sort of intelligence infrastructure in this region that it painstakingly built up in the tribal areas of Pakistan and Yemen.

CNN: Algeria attack changes terror landscape in North Africa