单词	helmet
释义	helmet From Longman Dictionary of Contemporary EnglishRelated topics: Transporthelmethel‧met /ˈhelmɪt/ ●●● W3 noun [countable]  DCCTTa strong hard hat that soldiers, motorcycle riders, the police etc wear to protect their heads → crash helmet, pith helmetExamples from the Corpushelmet• I remember having a scorpion on my helmet once.• There was a sentry in a steel helmet at the door.• First I thought that a bullet had hit me on the helmet and somehow bounced off.• With his other hand he took the helmet off.• The helmet is designed to limit the rotational forces affecting the head during an impact and is currently undergoing bench tests.• In the event of a threat to security, they would grab their helmets and weapons and rush to the trouble spot.Origin helmet (1400-1500) Old French helme “helmet”
随便看	immerse yourself in immerse yourself in something immersion immersion heater immersive immigrant immigrare immigrate immigration Immigration and Naturalization Service Immigration and Naturalization Service, the immigration control imminent imminent danger etc imminent danger/threat/death/disaster etc imminent death etc imminent disaster etc imminent peril imminent threat etc imminere immobile immobilise immobiliser immobility immobilize

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