ultrasonics
/ʌltrə'sɒnɪks/ /ˌʌltrə'sɑnɪks/
n. 
波学
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introduce, introducer, introducing, introduction, introductive, introductory, introfaction, introfier, introflexed, introflexion,
相似单词
ultrasome, ultrasonator, ultrasonic, ultrasonication, ultrasonicator, ultrasonics, ultrasonictherapy, ultrasonocardiograph, ultrasonocardio-tomography, ultrasonogram,