How to add comments to Drupal 7 in PHP using Drupal Services Module

As far as I know, Drupal Services Module can allow PHP scripts to communicate with Drupal 7. But how to add a comment to a post using this module?

Example will be ap开发者_Python百科preciated.

here is the testcode that does exactly that

http://drupalcode.org/project/services.git/blob/refs/heads/7.x-3.x:/tests/functional/ServicesResourceCommentTests.test#l100