配置有关问题。望多给些意见

配置问题。望多给些意见！
配置文件夹下的environment.rb
请给解释一下下面每个配置是配置什么的，谢谢！您要有经历就给介绍一下整个配置文件的配置项，十分感谢了。
如：
# config.i18n.default_locale = :de
是配置中文化的（或者更好的解释）。我把一些配置项发上，望给解释一下！我的是rails2.3.2版本。
 1 # Settings in config/environments/* take precedence over those specified here.
 2 # Application configuration should go into files in config/initializers
 3 # -- all .rb files in that directory are automatically loaded.

 4 # Add additional load paths for your own custom dirs
 5 # config.load_paths += %W( #{RAILS_ROOT}/extras )

 6 # Specify gems that this application depends on and have them installed with rake gems:install
 7 # config.gem "bj"
 8 # config.gem "hpricot", :version => '0.6', :source => "http://code.whytheluckystiff.net"
 9 # config.gem "sqlite3-ruby", :lib => "sqlite3"
 10 # config.gem "aws-s3", :lib => "aws/s3"

 11 # Only load the plugins named here, in the order given (default is alphabetical).
 12 # :all can be used as a placeholder for all plugins not explicitly named
 13 # config.plugins = [ :exception_notification, :ssl_requirement, :all ]

 14 # Skip frameworks you're not going to use. To use Rails without a database,
 15 # you must remove the Active Record framework.
 16 # config.frameworks -= [ :active_record, :active_resource, :action_mailer ]

 17 # Activate observers that should always be running
 18 # config.active_record.observers = :cacher, :garbage_collector, :forum_observer

 19 # Set Time.zone default to the specified zone and make Active Record auto-convert to this zone.
 20 # Run "rake -D time" for a list of tasks for finding time zone names.
 21 config.time_zone = 'UTC'
 22 # The default locale is :en and all translations from config/locales/*.rb,yml are auto loaded.
 23 # config.i18n.load_path += Dir[Rails.root.join('my', 'locales', '*.{rb,yml}')]

------解决方案--------------------
1. 你不会是想让别人一句句和你解释吧配置的作用吧，我想这个你去搜索一下资料的好，或者找本书，毕竟论坛不是教室

2. link_to image_tag(...),....