secondaryadj.次要的；从属的；中等教育的n.副手；次要位置secondary exit后备太平门secondary card辅助卡片secondary mill二次磨机,二次磨碎机secondary spar辅助翼梁secondary celln.蓄电池secondary eddy二次生成涡secondary stay副拉线secondary root次生根secondary task次要任务,辅助任务,辅任务secondary axes副轴