| 单词 | ultrasonic |
| 释义 | DEFINITIVE EXAMPLES 权威例句〔depth sounder〕An ultrasonic instrument used to measure the depth of water under a ship.回声测深仪：用来测量船下水深的超声设备美国传统〔measure〕He measured the speed at which ultrasonic waves travel along the bone.他测出了超声波穿过骨头的速度。柯林斯高阶〔pitch〕Ultrasonic waves are at a higher pitch than the human ear can hear.超声波的音高超出了人耳可以听见的范围。朗文当代〔second〕Ultrasonic waves travel at around 300 metres per second .超声波的传播速度约为每秒 300 米。朗文当代〔ultrasonics〕The acoustics of ultrasonic sound.超音频声音的音响学美国传统〔ultrasound〕Ultrasonic sound.超声波美国传统Bats use ultrasonic waves to locate flying insects at night, and engineers use them to detect flaws in metals.蝙蝠在晚上利用超声波确定飞行昆虫的位置, 而工程师们利用超声波探测金属里的瑕疵。剑桥国际 |
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