Noise Figure杂波指数 Noise Factor噪声因数[系数] Noise Filter杂音滤波器 National Fine (screw thread, Society of Automotive Engineers)国家罚款(螺纹、社会的汽车工程师) National Formulary国家处方集 Nutrition Foundation营养基金会[美] Normal format标准格式 Norme Francaise法国标准 Natural Frequency固有频率 Nifedipins sustained-release tablets硝苯地平缓释片 national fine美制细牙螺纹 NorFolk islands偌福克岛 Negative Feedback负回援，负反馈 Neurofibromatosis, Inc.神经纤维瘤、股份有限公司 New Front (Suriname)新阵线(苏利南)