It is compulsory for all motorcyclists to wear helmets.所有骑摩托车的人都必须戴头盔，这是强制性的。motorcyclists with leather gauntlets戴着皮护手套的摩托车手The motorcyclists rammed down the highway.摩托车手们沿着公路飞驰而去....
The motorcyclists rammed down the highway.摩托车手们沿着公路飞驰而去....a couple of youths in motorcyclists' black leathers.两个穿黑色机车皮衣的年轻人...police motorcyclists bringing up the rear of the procession.摩托骑警行进在队伍最后It is compulsory ...