User-agent: *
Disallow: /bk/category.php*
Disallow: /bk/item.php*
Disallow: /bk/mania.php*
Disallow: /bk/similar.php*

User-agent: Slurp
Crawl-delay: 20

User-agent: Googlebot-Mobile
Disallow: /

User-agent: baiduspider
Disallow: /

User-agent: Yeti
Disallow: /

User-agent: psbot
Disallow: /

User-agent: Twiceler
Disallow: /

User-agent: YodaoBot
Disallow: /

User-agent: MJ12bot
Disallow: /