roller-blade

n．(四个轮子排成一排的)旱冰鞋 v.滑旱冰

role-play, roll, roll around, roll back, roll in, roll into, roll of honour, roll out, roll up, roll-bar, roll-call, roll-on, roll-on roll-off, roll-top desk, roll-up, rolled gold, rolled oats, roller, roller bandage, roller towel, roller-coaster (Brit also switchback), roller-skate (also skate), roller-skating, rollicking, rolling stone, rolling-mill, rolling-pin, rolling-stock, rollmop, Rolls-Royce, roly-poly, ROM, Roman, Roman candle, Roman Catholic (also Catholic), Roman nose, Roman numerals, Romance, Romanesque, Romania,