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Pneumatic signals will travel only at sonic speeds . 气动信号的传输速度仅仅相当于音速。
2.
Empirical results are needed in the transonic mach regime . 在跨音速马赫数范围内需要经验结果。
3.
In the ocean, the velocity of sound varies with the temperature, salinity, and depth of the water . 在海洋中，音速随着水的温度、盐分和深度而变化。
4.
The holes themselves have a restricting or stabilizing effect because flow may become sonic . 因为这时流动可成为音速流动，所以这些小孔本身有一种节制作用或稳定化作用。
5.
As the velocity in the nozzle throat is sonic, the effect must be transmitted upstream through the boundary layer . 当喷管喉部达到音速时，这种影响一定是通过附面层向上传播而引起的。
6.
He observed that everyone at the press table was scribbling and the official stenotypist had his head down, fingers racing . 他注意到记者席上的人都在忙着记录，官方按音速记员也低着头，手指飞快地动着。
7.
Unlike in subsonic and transonic speed regimes, the interference resulting from the finite size of the test region is seldom present . 不像在亚、跨音速区域，这里因试验段尺寸有限造成的干扰是难得存在的。
8.
Although strain gage balances have been most useful in transonic and supersonic tunnels, they are by no means excluded from lowspeed work . 虽然，应变天平最适用于接近音速和跨超音速风洞，但丝毫不意味着不能用于低速实验。
9.
This is, of course, the reason why a sonic boom hits us with all its fury from a supersonic aircraft but not from a subsonic one . 当然，这就是为什么音爆从超音速飞机上以它的全部力量向我们冲来，而音速飞机上则没有音爆传来。
10.
Departures form the ideal practice followed by the wright have been particularly noticeable in the development of supersonic and hypersonic vehicles . 特别值得注意的是在发展超音速和高超音速飞行器的过程中，偏离了莱特理想的工作方式。
