nonanen.[化]壬烷nonadv.[拉]非；不是nondescript herd血统不明的畜群nonmetabolizable不可代谢的non-trade area非贸易区non-isothermal不等温的nonavid antibody无亲合力抗体nondiscolorationn.不变色nonvolatile chip非易失性芯片non-commercial非贸易non-essentialsn.非必需品non-registeredn.未登记