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1引言1954年微波激射器问世,距今已有55年,这是20世纪的重大发明之一。然而,科学家对太空的探测结果表明,微波激射在宇宙空间已经存在了几十亿年。
1 Introduction Microwave lasers were introduced in 1954 dating back 55 years, one of the major inventions of the 20th century. However, scientists’ observations of space show that microwave lasers have been in the universe for billions of years.