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 fracture继发性骨折
secondary inoculum二级免疫功能
secondary isochron二次等时线
secondary additive[化] 辅助配合剂
secondary reserves二次采油储量
secondary disaster次生灾害
secondary cementum细胞性牙骨质
secondary meridian副子午线
secondary branchia次生鳃(动)
secondary entoderm后成内胚层