未来十年内，这种差距还会扩大，因为美国海军最终将部署喷气动力无人机，其初期版本已经在加利福尼亚沙漠地区进行测试。

The disparity will only increase in the next decade, as the U.S. Navy finally deploys jet-powered killer drones, early versions of which are already undergoing testing in the California desert.

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本地区的居民经常笑侃，天空中唯一能存活下来的生命就是巨大的喷气式飞机。

Locals used to joke that the only life that could survive in the skies was jumbo jets.

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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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