category use类别使用categoryn.种类；类别；范畴Category II tuberculosis复治涂阳肺结核category judgement method分类鉴定法category of linear spaces线性空间的范畴category of impersonality无人称范畴category filter templates类别模板category of impersonaling无人称范畴category of Abelian groups阿贝耳群的范畴,交换群的范畴category of linear spacews线性空间的范畴category of a closed subset闭子集的畴数category-feature database类别特征信息库