non usen.不使用(不形成习惯；放弃)nonadv.[拉]非；不是nonleptonic interaction非轻子相互酌non-learning activity非学习活动non-propagating crack不扩展裂纹non-resistance policy不抵抗政策non-taxable exchanges免税财产交换non-numeric character非数字记号non-flux purification非熔剂净化non-recurrent revenue临时性收入non-magnetic metering无磁计量non-steady flow field非稳态流场