“ultrasound”的概念、定义、翻译、参考文献-科学参考

单词	ultrasound
释义	ultrasound [`ǝl·trǝ´sau̇nd] ^ACOUSTICS Sound with a frequency above about 20,000 Hz, the upper limit of human hearing.
随便看	tubing safety valve Tubulanidae tubular capacitor tubular exchanger tubular gland tubule Tubulidentata tubulin tubuloacinous gland tubuloalveolar gland Tucana tuck-and-pat pointing tuck joint pointing tuck pointing tufa tufaceous tuff tuffaceous tuff ball tuff lava tuft tuft method tugboat tugger Tukey lemma

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