영어 프리젠테이션 (UFO 소개)

소개글

영어로 작성한 프리젠테이션 입니다. 프리젠테이션 준비할 때 도움이 될 듯 합니다.

목차

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본문내용

Unidentified flying object
Unidentified flying object (commonly abbreviated as UFO or U.F.O.) is the popular term for any aerial phenomenon whose cause cannot be easily or immediately determined. Both military and civilian research show that a significant majority of UFO sightings are identified after further investigation, either explicitly or indirectly through the presence of clear and simple explanatory factors. The United States Air Force, who coined the term in 1952, initially defined UFOs as those objects that remain unidentified after scrutiny by expert investigators, though the term UFO is often used more generally to describe any sighting unidentifiable to the reporting observer(s). Popular culture frequently takes the term UFO as a synonym for alien spacecraft.
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참고 자료

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