    # File lib/plugins/translation.rb, line 8
    def translate(text, langpair)
      text = Termtter::API.twitter.show(text)[:text] if /^\d+$/ =~ text

      req = Net::HTTP::Post.new('/translate_t')
      req.add_field('Content-Type', 'application/x-www-form-urlencoded')
      req.add_field('User-Agent', 'Mozilla/5.0')
      Net::HTTP.version_1_2 # Proxy に対応してない
      Net::HTTP.start('translate.google.co.jp', 80) {|http|
        response = http.request(req, "langpair=#{langpair}&text=#{URI.escape(text)}")
        doc = Nokogiri::HTML.parse(response.body, nil, 'utf-8')
        return doc.css('#result_box').text
      }
    end