Ostan纯氢氧化钠OSTabbr.科学与技术处(=office of science and technology)abbr.作战适用性试验(=operational suitability testing)Osteoprotegerin mRNA骨保护素Ostwald dilution law奥斯特瓦尔德稀释定律,奥斯托惠尔稀释律Osteoclasis of tibia胫骨折骨术Osteopathic Medicine骨科医学Osteogenic mechanism成骨机制osteogenetic process成骨过程ostium internum uteri[医] [子宫]颈管内口Ostrea gigas Thunb.长牡蛎Osteomeles subrotundan.圆叶小石积Ostrum Furst syndrome奥-弗二氏综合征