重点词汇
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不明飞行物
unidentified flying object (UFO); flying saucer
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缩写
abbreviate; shorten; abridge; abbreviation; acronym; initialism; contraction; abbr
Ufo abbreviation
不明飞行物
unidentified flying object (UFO); flying saucer
缩写
abbreviate; shorten; abridge; abbreviation; acronym; initialism; contraction; abbr