nonbookn.无真实价值的书(常指图片集、剪报集、演讲集等)nonadv.[拉]非；不是non-adjacent words非相邻词nonossifying fibroma非骨化性纤维瘤non-reactive black非活性炭黑nonnegative function非负函数non-regular motion非规则运动non-refundable fee非归还费用non -public sector非公有制经济non-recurrent part临时部门nonblockable message非阻塞性消息non-native workers外来工