[ 复数 trephines 第三人称单数 trephines 现在分词 trephining 过去式 trephined 过去分词 trephined ]
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N a surgical sawlike instrument for removing circular sections of bone, esp from the skull 带柄环锯
V to remove a circular section of bone from (esp the skull) 用环锯在(头骨)上钻孔
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