He became a construction worker after he left school. 离开学校后,他成为一名建筑工人。
A head covering of hard material, such as leather, metal, or plastic, worn by football players, firefighters, construction workers, motorcyclists, and others to protect the head. 头盔由坚硬材料如皮革、金属或塑料制成的头部覆盖物,由橄榄球队员、消防队员、建筑工人、摩托车骑手或其他人配戴,用以保护头部