nonusern.不行使权利；放弃权利；弃权nonadv.[拉]非；不是non-numeric portion非数值部分non-aggression pact互不侵犯条约non-Bragg direction非布拉格方向non-corrosive paper防腐纸non -small - cell非小细胞non-flowering plant不开花的植物non-uniformmutation非均匀变异non-threshold logic非阈逻辑non-metallic luster非金属光泽nonsharable attribute非共享属性