NNA=National Newspaper Association 全国报业协会[美]nn.字母nn-butyl pentanoate戊酸正丁酯N combination with P氦磷配合n-propyl cinnamate肉桂酸正丙酯n-pentatriacontanen.正三十五碳烷N-dialkyl chitosan单分子膜n-butylpyrrolioine正丁基吡咯烷N fertilization mode施肥方式n ucleoplyhedrovirus血液型脓病N.C.I. mixture[医] 萘木溜油碘仿合剂N-butylphenylether苯基丁基醚