| 释义 |
DEFINITIVE EXAMPLES 权威例句〔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〔supersonic〕Of or relating to sound waves beyond human audibility.超声波的:人无法听见的声波的或与超声波有关的美国传统〔ultrasonic〕Of, relating to, or involving ultrasound.超声波的美国传统 |