Nature Ecotourism Accreditation Program (Australia)自然生态旅游认证程序(澳大利亚) National Environmental Action Plan国家环境行动计划 National Environmental Action Programmes国家环境行动计划 National Environment Action Plan国家环境行动计划 Nottingham Early Assessment Package (communication development)诺丁汉郡早期评估包(通信的发展) Near Earth Asteroid Prospector (SpaceDev)近地小行星探勘者号(SpaceDev) Northeast Area Partnership东北地区合作伙伴 Near Equal As Possible (tides)尽可能靠近相等(潮汐) Near Earth Asteroid Prospector近地小行星探矿者