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1. Oxford Dictionary

   sonic boom

   英式

   • n.
     a loud explosive noise caused by the shock wave from an aircraft or other object travelling faster than the speed of sound.

   • noun: sonic boom, plural noun: sonic booms

2. • 更多解釋

   sonic boom

   • IPA[ˈsänik bo͞om]

   美式

   • n.
     a loud explosive noise caused by the shock wave from an aircraft traveling faster than the ...

   Oxford American Dictionary