User-agent: *
Disallow: /cgi-bin
Disallow: /trackback/
Disallow: /tag/
Disallow: /comments
Disallow: */trackback
Disallow: */comments
Allow: /

User-agent: bingbot
Crawl-delay: 10

User-agent: Googlebot
Crawl-delay: 20

User-agent: googlebot
Crawl-delay: 20