英语词汇“trap door”的英英意思、用法、释义、翻译、读音、例句、短语、词组-英语词典-现代词典

单词	trap door
释义	Collins Concise English Dictionary © HarperCollins Publishers:: trap door n a door or flap flush with and covering an opening, esp in a ceiling
随便看	ammeter ammianus ammine ammino ammisaddai ammishaddai ammo ammocete ammon ammonal ammonate ammonation ammoni- ammonia ammonia alum ammoniac ammoniacal ammonia liquor ammonia solution ammoniate ammoniation ammonia water ammonic ammonification ammonifier

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