NASA是美国国家航空航天局的缩写词。
NASA is an ___acronym for National Aeronautics and Space Administration.
GPS和WiFi都是我们日常生活中常用的首字母缩写词。
GPS and WiFi are common ___acronyms we use in daily life.
‘雷达’这个词其实是‘无线电探测与测距’的缩写。
The word 'radar' is actually an ___acronym for Radio Detection And Ranging.
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