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B/ABefore and After
B/ABudget Authority
B/ABiological Assessment
B/ABarometric Altimeter
B/ABreathing Air (station)
B/ABooster Adapter
B/ABeta-Hydroxybutyrate/Acetoacetate (biophysics)
References in classic literature ?
He would have refused a bit of hers beforehand, but one is naturally at a different point of view before and after one's own share of puff is swallowed.