名词
中文翻译：头盔
同义词：
['cap', 'helmet', 'headgear', 'safety helmet例句：1. He put on his safety helmet before starting the bike.（他骑车前戴上了安全头盔。）2. The firefighters wore helmets to protect their heads from falling debris.（消防员们戴着头盔，以防头部受到坠落碎片的伤害。）']
例句：
-
1. He put on his safety helmet before starting the bike.
他骑车前戴上了安全头盔。
-
2. The firefighters wore helmets to protect their heads from falling debris.
消防员们戴着头盔，以防头部受到坠落碎片的伤害。
-
3. The boy was wearing a helmet when he fell off the bike.
那个男孩在从自行车上摔下来时戴着头盔。