ultrasoundn.
英 'ʌltrəsaʊnd | 美 'ʌltrəsaʊnd
中文n. 超声；超音波
词根词源
ultrasound (adj.)1911, from ultra- + sound (n.1). Compare ultrasonic. In reference to ultrasonic techniques of detection or diagnosis it is recorded from 1958.
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