{ "node_id": "gml-21ff39f056a142a4988e5717b93569d2",
"keywords": [ "安装Ubuntu", "安装CentOS" ],
"keywords_must": [["Ubuntu", "系统安装"], ["CentOS", "系统安装"], ["Debian", "系统安装"], ["RedHat", "系统安装"]],
"keywords_forbid": [],
"children": [],
"export": [ "exercise_01.json" ]
}