secondaryadj.次要的;从属的;中等教育的n.副手;次要位置
secondary acid二级酸
secondary cost间接费用
secondary yard辅助调车场
secondary mark[医] 继发性标(牙)
secondary case继发病例
secondary lobe旁波瓣
secondary gain再度获益
Secondary bulb次生鳞茎
secondary rays[医] 次生射线, 次级射线
secondary unit辅助热交换器