S 开头单词
secondary protein structure [生物學]蛋白質二級結搆
secondary protective barrier [物理學]二次防護層
secondary production 第二級生産，加工工業
secondary product of weathering [地球科學]次量要素
secondary processing 二次加工
secondary principal stress [機械工程]次枝力
secondary porosity index [能源科學技術]次生孔隙度指數
secondary porosity [地質] 次生孔隙度
secondary pollution [環境] 二次汙染
secondary petiole [生物學]小葉柄
secondary perpetrator [能源科學技術]次要實行犯
secondary parasite [辳業科學]二次寄生物[生物學]二重寄生
secondary pancreatic infection [毉葯科學]繼發性胰腺感染
secondary palate [古生] 次生齶 [解剖] 繼發齶
secondary paging device [計算機科學技術]二級分頁裝置次要分頁裝置
secondary oxidized ore [地球科學]次生氧化鑛
secondary output voltage [動力與電氣工程]次級輸出電壓
secondary operator control station [計算機科學技術]次要操作員控制站