Ostern.奥斯特OSTabbr.科学与技术处(=office of science and technology)abbr.作战适用性试验(=operational suitability testing)Osteoarthritis/etiol骨关节炎／病因osteoplastic amputation[医] 骨成形性切断术osteoarthritis of elbow肘骨关节炎Ostrinia furnalis Guenc亚洲玉米螟osteoelastic resorption破骨细胞性吸收osteodystrophia fibrosa[医] 纤维性骨营养不良, 囊状纤维性骨炎osteolytic osteosarcoma溶骨性骨肉瘤osteoarthrosis of spine脊柱骨关节病osteoepiphyseal portion骨骺部osteogenic sarcoma cell骨肉瘤细胞