ultrasonic
畅通词汇
英
[ˌʌltrə'sɒnɪk]
美
[ˌʌltrə'sɑːnɪk]
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Adjective:
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having frequencies above those of audible sound
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用作形容词 (adj.)
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The doctors gave him an ultrasonic brain scan.
医生给他做了脑部超声波扫描检查。
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Much as bats do, robots send out ultrasonic signals.
机器人就象蝙蝠那样地发出超声波讯号。
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