短語詞組短語row characteristic vector 行特征向量row w vector 行矢量;行向量row sum vector 行和向量dimension at row vector 維行向量n dimensional row vector 維行向量row weight sum vector 行權(quán)和向量dimension row vector 維行向量row -union vector 行并向量a row vector 一個(gè)行矢量 返回 row vector