ul·tra·sound /ˈʌltrəˌsaʊnd/
超聲; 超聲波
ul·tra·sound /ˈəltrəˌsaʊnd/ 名詞
超聲
ultrasound
超聲
ultrasound
超聲
ultrasound
n 1: very high frequency sound; used in ultrasonography
2: using the reflections of high-frequency sound waves to
construct an image of a body organ (a sonogram); commonly
used to observe fetal growth or study bodily organs [syn:
sonography, ultrasonography]