ncvn.c.v.nocommercialva..NCVANational Center(s) for Volunteer Action 全国志愿者行动中心NCVONational Council for Voluntary Organizations 全国志愿组织理事会NCVS[医][=nerve conduction velocity studies]神经传导速度研究NCVTNational Crime and Violence Test 国家犯罪和暴力测试NCVAENational Council for Audio-Visual Aids in Education 全国教育视听教具委员会NCVOTENational Center for Vocational, Occupational, and Technical Education 全国职业技术教育中心NCVc.v.abbr.no commercial value 无商业价值