易混淆的单词： Ufoufo

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Sketch of a ufo made by a witness .

目击者所画的不明飞行物示意图。

He had earlier claimed to have been shown round a ufo in 2001 .

他曾称自己在2001年参观过一个不明飞行物。

It can now be found among the many mysterious incidentsfeatured in official ufo files released today .

在官方今天公布的不明飞行物档案里，这份报告现在可以在许多专门记述神秘事件的文件中找到。

Some ufo sightings could be explained by ball lightning and other atmospheric phenomena , claims australian astrophysicist stephen hughes .

澳大利亚天体物理学家斯蒂芬休斯称球状闪电和其他大气现象可以解释人们看到一些不明飞行物（ufo）现象。

That man was jimmy carter , who remains the first and only president of the united states to officially report a ufo sighting .

他叫吉米卡特，在美国是第一个且仍然是唯一一个使用职权报道不明飞行物的总统。