secondary use二次使用secondaryadj.次要的；从属的；中等教育的n.副手；次要位置secondary suspension gear二级悬式齿轮secondary business center次要商业中心Secondary dynamic cooling二冷动态配水secondary lymphoid nodule次级淋巴小结secondary raynaud disease继发性雷诺病Secondary hypocortisolism继发性肾上腺皮质功能减退secondary data set ground[计] 次数据集组secondary visual training次级视觉训练secondary hyperthyroidism继发性甲亢secondary alkyl sulfonate促烷基磺酸酯