英语词汇extrados怎么读，是什么意思，单词翻译、读音、固定搭配用法和短语词组及例句-英汉双解词典

单词	extrados
释义	ex·tra·dos /eksˈtreɪdɒs/([复] -dos(es)) n. 【建】拱背(拱的外缘线) [Fr < EXTRA- + dos back < L dorsum back]
随便看	hematogen hematogeneses hematogenesis hematogenesis's hematogenetic hematogenic hematogenic hematogenic , hematogenetic hematogenous hematoid hematologic hematologic hematological hematologic , hematological hematologies hematologies' hematologist hematologist hematologists hematologist's hematology hematology's hematolyses hematolysis hematolysis's

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