normal set良序集normaladj.正常的；正规的；精神健全的n.常态；标准Normal Lube-Oil Tank标准润滑油箱normal linear operator正规线性算子normal reference value正常参考值normal state relations正常的国家关系normal crystallization正常结晶normal velocity vector法速向量normal school students师范生normal working voltage正常工作电压Normal subsemigroupoid正规子半群胚normal matrix approach正规矩阵方法