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单词 ultrasonics
释义

WordReference Random House Unabridged Dictionary of American English © 2024
ul•tra•son•ics  (ul′trə soniks),USA pronunciation n. (used with a sing. v.)
  1. Physicsthe branch of science that deals with the effects of sound waves above human perception.
  • see ultrasonic, -ics 1930–35

Collins Concise English Dictionary © HarperCollins Publishers::
ultrasonics /ˌʌltrəˈsɒnɪks/ n
  1. (functioning as singular) the branch of physics concerned with ultrasonic waves
    Also called: supersonics
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