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单词
ultrasonic wave
释义
Dictionary
See
ultrasound
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
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更新时间:2025/3/2 3:23:59