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a large increase in the force opposing a moving object as its speed reaches the speed at which sound travels声障,音障(指飞行物的速度达到音速时所产生的气动阻力急剧增大)

There is usually a sonic boom when an aircraft breaks the sound barrier.飞机冲破声障时,通常会产生音爆。
the sound barrier
Relating to operating aircraft: aerobatics, aerospace, airborne...

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