n.头盔( helmet的名词复数 );
例句:
Motorcyclists must wear helmets to shield them from injury.
摩托车手必须戴头盔保护自己免受伤害.
The construction workers wore metal helmets for protection.
建筑工人为了防护而带金属头盔.
The officers all wore helmets; better-fitting helmets.
军官们都戴钢盔; 大小比较合适.