outbreak

n.爆发；发生

out of power, out of practice, out of proportion, out of question, out of sight, out of step, out of the corner of one's eye, out of the question, out of touch, out of work, out-, out-and-out, out-of-phase, out-of-shape, out-patient, out-tray, outage, outback, outbid, outboard motor, outbuilding, outburst, outcast, outcaste, outclass, outcome, outcrop, outcry, outdated, outdistance, outdo, outdoor, outdoors, outer, outer space, outermost, outface, outfall, outfield, outfielder,