outer space

n.外层空间

out-tray, outage, outback, outbid, outboard motor, outbreak, outbuilding, outburst, outcast, outcaste, outclass, outcome, outcrop, outcry, outdated, outdistance, outdo, outdoor, outdoors, outer, outermost, outface, outfall, outfield, outfielder, outfight, outfit, outfitter, outflank, outflow, outfox, outgoing, outgoings, outgrow, outgrowth, outhouse, outing, outland, outlandish, outlandishly,