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a type of hard hat that protects the head, worn, for example, by a police officer, a soldier or a person riding a bike or motorbike or playing some sports 头盔;防护帽 Police in riot helmets lined the streets. 戴着防暴头盔的警察站在沿街两边。 A protective helmet should be worn at all times. 随时都应该头戴防护帽。 Cycle helmets dramatically reduce the risk and severity of head injuries. 自行车头盔大大降低了头部受伤的风险和严重程度。
Oxford Collocations Dictionaryadjective- leather
- metal
- plastic
- …
- have on
- wear
- don
- …
- visor
Word Originlate Middle English: from Old French, diminutive of helme, of Germanic origin.