User-agent: Googlebot
Disallow: /admin/
Crawl-delay: 20
User-agent: BaiDuSpider
Disallow: /admin/
Crawl-delay: 20
User-agent: sohu-search
Disallow: /admin/
Crawl-delay: 20
User-agent: Slurp
Disallow: /admin/
Crawl-delay: 20