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fallback
mastery/ˈfɔːl.bæk/nounadjverb
card 1 of 5 · fill in the blank
A failure of one of the rocket's first-stage engines just after liftoff would result in a _____ pad fallback.
card 1 of 5 · fill in the blank
A failure of one of the rocket's first-stage engines just after liftoff would result in a _____ pad fallback.