NKabbr.自然杀伤(=natural killer)nn.字母nn-alkanes正构烷烃N-fear.别怕。n-alkanol正构醇N Yorkshire北约克郡N-butanlo正丁醇n-hexanol正己醇n/a/vabbr.=net asset value 【商】资产净值N. lugens褐飞虱n/p/rabbr.=noise/power/ratio 噪音功率比N-oblivon氨甲酸甲戊炔酯, 甲戊炔醇氨基甲酸酯