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词汇 radar
词源

radar n.

"electronic system for locating and tracking objects at a distance by means of radio waves," 1941, acronym (more or less) from radio detecting and ranging. The U.S. choice, it won out over British radiolocation. Figurative from 1950.

updated on March 29, 2021

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更新时间:2025/5/2 4:39:54