... [ marvellously quick ] 出奇的速度 [ velocity of sound ] 声波传播的速度 [ stall ] 飞机或机翼在迎角大于最大升力迎角时工作的情况，其特点为气流分离，操纵失效 ...
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声波在水中传播的速度 Sound speed in water
当然，超声波很早就已用于医疗成像，其应用的依据是声波在密度更大的组织中传播速度更快。
Ultrasound has, of course, long been used in medical imaging. It relies on the fact that sound travels faster through denser tissues.
介绍了声学测温的基本原理，推导了声波传播速度与介质温度的关系式，阐述了声学测温的巨大优势和存在问题。
The main principle is introduced, and the relationship between speed of sonic wave and media temperature is deduced. The great merits and existing questions of acoustic pyrometry are shown.
研究表明，声波在同一介质中的传播速度和波源的速度无关。
According to certain research, the spread velocity of sound waves has nothing to do with the speed of the ripples.
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