五角大楼官员说，目前，我们只是在观察。

'Right now, we're just watching,' a Pentagon official said.

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五角大楼官员说，近几个星期，俄罗斯向叙利亚北部地区派遣轰炸机、喷气机和地面部队，增加它在叙利亚的军事力量。

Russia has been building up its forces in Syria, with bombers, jets and troops arriving in northwest Syria in recent weeks, according to Pentagon officials.

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五角大楼的官员说他们相信他还在利比亚。“我们没有关于他离开这个国家的任何消息。”一位发言人说。

Pentagon officials said they believed he remained in Libya. "We do not have any information that he has left the country," a spokesman said.

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