NCRn.不需要碳(核的)NCabbr.免费(=no charge)abbr.不赊账(=no credit)abbr.(美国州名)北卡罗来纳(=North Carolina)NC manufacture数控加工ncural network神经网络ncial riskRisk财务风险NCD prevention慢性病防制NC improvement数控化改造ncurocndocrinc神经内分泌癌NC tube bender数控弯管NC programming数控编程NC gear shaper数控插齿机NC Reformation数控化改造