跨声速度 transonic speed
超声速度 speed of sound ; SOS ; Speed of ultrasound
超声脉冲速度法 ultrasonic pulse velocity method
声媒质体积速度 [声] sound volume velocity
声速梯度 sound velocity gradient
声音的速度 Speed of Sound
声波速度 speed of sound ; acoustic velocity ; SVEL ; SOS
超声波速度测量 supersonic velocity measurement
速度计水中声速测定仪 velocimeter
低密度超声速减速器 LDSD
然后他一跃自由而下，自由落体时的降落速度高达982公里/小时，几乎接近了1200公里/小时的声速，而且他还经历了零下52摄氏度的低温。
He then leaped and freefell at speeds of up to 614 mph, not far from the speed of sound's 761 mph, and endured temperatures as low as minus 94 degrees Fahrenheit.
之后他们压缩减压能产生声波的这种气体。数据表示部分冷凝物的速度超过声速，因此他们制出了声音的黑洞边界。
Their data showed that the speed of part of the condensate exceeded the speed of sound, and they had therefore made an acoustic event horizon.
这座储能厂会把“闲时”的电力储存在2500磅的飞轮电池中。 飞轮的轮缘线速度之高，超过声速。
The plant would store cheap "off peak" electricity in 2,500-pound flywheels that turn faster than the speed of sound.
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