盔

例句：

1. 1.He put on his helmet and stepped into the ring.
   他戴上头盔，走进了拳击场。
2. 2.The soldier wore a helmet to protect his head from injury.
   士兵戴着头盔以保护头部免受伤害。
3. 3. The driver was wearing a safety helmet when he fell off the bike.
   当司机从自行车上摔下来时，他戴着安全头盔。