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1)  varying rate of sound speed
声速变率
2)  Speed of sound
超声速率
1.
Speed of sound (SOS) of the radius, phalanx and tibia was assessed using the instrument of Omnisense (Sunlight Ltd.
目的横断面社区研究分析绝经后妇女OSTA指数及多部位定量骨超声(quantitativeultrasound,QUS)[超声速率(speedofsound,SOS)],探讨该两个指标预测非椎骨骨折的价值。
3)  sound speed
声速率
4)  variation of the sound velocity
变声速
1.
In order to improve the past simulation about high pressure fuel injection system for diesel engine, this paper introduces the program of the simulation based on numerical calculation software MATLAB, which considers the variation of the sound velocity, density and their effect on fuel pressure, especially on fuel pressure transmission in pipe.
计算中考虑到变声速和变密度的处理对系统中燃油压力的影响,特别是对高压油管中燃油压力传递的影响。
5)  reduced rate of sonic velocity
声速降低率
6)  acoustic emission rate process
声发射速率
补充资料:变率
1.变化的速度。 2.表示数列平均变动程度的量。气象上往往指一定时段内(一般取月﹑季或年)个别气象要素值历年间的变化程度。
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