User-agent: bingbot
Crawl-delay: 2

User-agent: Googlebot
Crawl-delay: 2

User-agent: Slurp
Crawl-delay: 2

User-agent: Mediapartners-Google
Crawl-delay: 2

User-agent: Adsbot-Google
Crawl-delay: 2

User-agent: Googlebot-Image
Crawl-delay: 2

User-agent: Googlebot-Mobile
Crawl-delay: 2

User-agent: MJ12bot
Disallow: /

User-agent: dotbot
Disallow: /

User-agent: AhrefsBot
Disallow: / 

User-agent: spbot
Disallow: /

User-agent: *
Crawl-delay: 20