Helmet
01
头盔, 安全帽
a hard hat worn by soldiers, bikers, etc. for protection
例子
The cyclist adjusted his aerodynamic helmet and set off on the race.
自行车手调整了他的空气动力学头盔，然后开始了比赛。
02
a plate or piece of armor specifically designed to protect the head in combat
例子
Medieval soldiers wore helmets made of iron.
