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人體最硬的骨頭是下顎骨(頷骨)?The hardest bone in the human body is the jawbone.龜龜?shù)亩哪ねǔＴ谙骂€骨的后邊.The ear scales , the tympanic membranes , are the two large'scales'just behind the jaw - bone....

“下顎骨”的英語可以翻譯為：jawbone，submaxilary ...