[{"title":"( 3 个子文件 6.95MB ) 《矩阵论(第二版)》","children":[{"title":"矩阵论(高等学校教材 ) 第二版正文.pdf <span style='color:#111;'> 7.39MB </span>","children":null,"spread":false},{"title":"矩阵论.txt <span style='color:#111;'> 2.17KB </span>","children":null,"spread":false},{"title":"e事通论坛.url <span style='color:#111;'> 272B </span>","children":null,"spread":false}],"spread":true}]