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单词	helmet
释义	helmethelmet /ˈhɛlmɪt/ ●●● W3 noun [countable] Etymology ETYMOLOGYhelmet Origin: 1400-1500 Old French helme helmet a hard hat that covers and protects your head → see also crash helmet, pith helmet
随便看	facsimile fact fact family fact-finding faction factional factitious factoid factor factorial factoring factorization factor market factor of production factor theorem factory factory farm factory farming factory floor factory system factotum fact sheet factual factually facultative anaerobe

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