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the sound barrier

noun
/ðə ˈsaʊnd bæriə(r)/
/ðə ˈsaʊnd bæriər/
[singular]
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  1. the point at which an aircraft’s speed is the same as the speed of sound, causing reduced control, a very loud noise (called a sonic boom) and various other effects声障;音障
    • to break the sound barrier (= to travel faster than the speed of sound)突破声障(即速度超过声速)

See also: the sound barrier

the sound barrier
Relating to operating aircraft: aerobatics, aerospace, airborne...

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