The new airplane flies at twice the speed of sound.
这架新式飞机以两倍于音速得速度飞行。
The aeroplane will travel at twice the speed of sound.
这架飞机的速度将是音速的两倍。
In addition to that, we've measured the speed of sound.
除此之外，我们还测量过音速。
The aim is to fly at about Mach 0, twice the speed of sound.
目标是以大约2马赫得速度飞行，也就是音速得两倍。
The aim is to fly at about Mach 2, twice the speed of sound.
目标是以大约2马赫的速度飞行，也就是音速的两倍。
The sound waves from the plane can speed on ahead of the plane.
来自飞机得声波能跑到飞机得前面。
Ability to fly at 7 times speed of sound could boost space flight
速度达7倍音速，可进行宇宙飞行
an instrument for measuring the speed of an aircraft relative to the speed of sound.
能够测量航行器相对于声速的速度的仪器。
Adoption of the Sound Measures to Speed up the Development of Forestry Tertiary Industry
切实采取得力措施加快发展林业第三产业
Hypersonic aircraft refers to the speed of sound, at least 5 times more than the aircraft.
高超音速飞机是指超过音速至少5倍得飞机。
The speed of sound increases slightly with a rise in temperature and falls with a decrease in temperature. It is not affected by the pressure of the air.
声速随温度的升降有些微小的增减，但不受气压的影响。
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