Operator Error操作者误差 Opto-Electronic光电 On Examinationadj. 在检查时 Order Entry指令进入 Observed to Expected ratio (environmental & medical research)预期的比率(观察到环境及医学研究) Optical/Electrical Converter光/电力转换器 Optic to Electric光对电力 ratio of observed to expected观察数与预期数比率