helmet

名词

1. 1

   安全帽、头盔

   Always wear a helmet when you ride a scooter.

   骑机车时一定要戴安全帽。

2. 2

   钢盔、头盔军事

   The soldiers put on their helmets before leaving the base.

   士兵们离开基地前戴上了钢盔。