{"version":"1.0", "provider_name":"www.wp1.ja-jp.nina.az", "provider_url":"https://www.wp1.ja-jp.nina.az", "author_name":"www.wp1.ja-jp.nina.az", "author_url":"https://www.wp1.ja-jp.nina.az", "title":"指示函数", "type":"rich", "width":600, "height":338, "html":"
指示函数<\/a><\/blockquote>\n