单词	doornail
释义	door·nail (dôrnāl′) n. A large-headed nail. Idiom: dead as a doornail Undoubtedly dead.
随便看	radio telescope radiotherapist radiotherapy radiothermal radiotoxic radiotoxicity radiotracer radio wave radish Radisson radium radium therapy radius radius vector radix RADM Radom radome radon radula radular RAF Rafael Leónidas Raffaelo Sanzio. raffia

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