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helmet
hum
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hel·met

helmet

 
 
pronunciation:
hel miht
features:
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part of speech: noun
definition: a hard covering worn to protect the head.
头盔
It is dangerous to ride a bicycle without a helmet.骑自行车不戴头盔很危险。
 
derivations: helmeted (adj.), helmetlike (adj.)
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  head, weapon