secondary air二次风
secondaryadj.次要的;从属的;中等教育的n.副手;次要位置
secondary circle次大圆,副圈
secondary fossil次生化石
secondary fibril次级细丝
secondary modernn.现代中学
secondary-loan次贷
secondary tissue次生组织
secondary villus次级绒毛
secondary moment副力矩,次要力矩,二阶矩,二次矩
secondary system二次系统; 辅助系统
secondary ageing二次时效