secondary ion二次离子secondaryadj.次要的；从属的；中等教育的n.副手；次要位置secondary exponential smoothing method二次指数平滑法Secondary Surveillance Radar Processor辅助监视雷达处理机Secondary adrenocortical insufficiency继发性肾上腺皮质功能不全Secondary specialized nursing students中职护生secondary water supply management mode二次供水管理模式secondary school-leaving certificate中等学校毕业证书secondary and tertiary economic sectors第二、三产业Secondary acquired sideroblastic anemia继发性获得性铁粒幼细胞性贫血secondary and elementary school teacher教师secondary cooling of continuous casting连铸二冷