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1. Oxford Dictionary

   flight envelope

   • n.
     the range of combinations of speed, altitude, angle of attack, etc., within which a flying object is aerodynamically stable.

   • noun: flight envelope, plural noun: flight envelopes

2. • 更多解釋

   flight envelope

   • IPA[flīt ˈenvəˌlōp]

   • n.
     the range of combinations of speed, altitude, angle of attack, etc., within which a flying ...

   Oxford American Dictionary