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flight recorder

noun
🔊/ˈflaɪt rɪkɔːdə(r)/
🔊/ˈflaɪt rɪkɔːrdər/
(also black box)
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  1. a small machine in a plane that records all the details of each flight and is useful for finding out the cause of an accident黑匣子；黑盒；飞行记录仪Topics Transport by airc2