Osma奥斯马OSabbr.操作系统=（Operating System）oscilating follower摆动随动件oseen approximation奥新近似,奥森近似Osphranter robustus岩大袋鼠os petrosoccipitale岩枕骨oscillating mirrors摆镜Osmium radioisotope锇放射性同位素Oscillatoria sanctan.清净颤藻oscillating contour振荡电路oscillating monitor摆动式消防炮oscilloscope screen示波屏