secondary bus辅助总线secondaryadj.次要的；从属的；中等教育的n.副手；次要位置secondary amyl另戊基secondary type辅模,次级模式标本secondary tint柔和的颜色secondary seed第二位种子secondary coiln.次级线圈；二次线圈secondary codon第二遗传密码子secondary shock继发性休克,二次性休克secondary truss次要桁架secondary entry辅助款目secondary track辅助线路