secondary tin再生锡secondaryadj.次要的；从属的；中等教育的n.副手；次要位置secondary coolant二次冷却剂secondary wavelet次级子波secondary inertia二次惯性力secondary starting二次停车secondary strainer二次滤网secondary products次级产品secondary mutation次级突变secondary aneurysm继发性动脉瘤secondary students中专学生secondary vitreous续发玻璃状体