Already deeply hostile to outside interference, the people of the rugged mountains and valleys along the 1, 500-mile frontier had become steadily more radicalised over the previous years.

虽然对外界的干扰深有敌意，但是现在生活在阿富汗和巴基斯坦1500英里边境线的崎岖山谷中的居民没有前些年那么激进了。

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Indeed, locals have told Americans that he has been sighted in the inhospitable mountains of Pakistan's north-west frontier.

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