英语词汇“ultrasonic wave”的英英意思、用法、释义、翻译、读音、例句、短语、词组-英语词典

单词	ultrasonic wave
释义	DictionarySeeultrasound ultrasonic wave ultrasonic wave [¦əl·trə′sän·ik ′wāv] (acoustics) A sound wave that has a frequency above about 20,000 hertz. ultrasonic wave ultrasonic wave A sound wave of greater frequency than 20 kHz. These waves do not produce sound audible to the human ear. See also: wave FinancialSeeWave
随便看	child killer child killing child labor child-labor child labor coalition child labor cocoa coordinating group child labor education and action project child labor elimination group child labor in mining child labor in the mining industry child labor laws child labor laws in the united states child labor research initiative child labour child labour in britain in the 1800s child labour in mining child labour intersectoral group child labour in the mining industry child labour news service child labour programme of action child labour survey child-langmuir equation child-langmuir law child-langmuir-schottky equation child language

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