中文: abbr. non-disclosure agreement 保密协议; nondestructive analysis 非破坏性分析; nondestructive assay 非破坏性化验; new drug application 新药申请
中文: abbr. new domestic boiler 新民用锅炉; new donkey boiler 新辅助锅炉; national development bond(ing) 国家发展债券; non directional beacon 非定向灯塔