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单词 sonar
释义

WordReference Random House Learner's Dictionary of American English © 2024
so•nar /ˈsoʊnɑr/USA pronunciation   n. 
  1. Nautical, Naval Terms a method for locating underwater objects by sending out sound waves that reflect off an object and bounce back to the sensing device:[uncountable]They located the enemy submarine by sonar.
  2. Nautical, Naval Terms the apparatus used in sonar:[countable]Are the Russian sonars as good as ours?
See -son-.
WordReference Random House Unabridged Dictionary of American English © 2024
so•nar  (sōnär),USA pronunciation n. 
  1. Nautical, Naval Termsa method for detecting and locating objects submerged in water by echolocation.
  2. Nautical, Naval Termsthe apparatus used in sonar. Also called,[Brit.,] asdic. 
  • so(und) na(vigation) r(anging) 1940–45

Collins Concise English Dictionary © HarperCollins Publishers::
sonar /ˈsəʊnɑː/ n
  1. a communication and position-finding device used in underwater navigation and target detection using echolocation
Etymology: 20th Century: from so(und) na(vigation and) r(anging)
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