The keybinding that runs the correspondingly-numbered command in /apps/metacity/keybinding_commands The format looks like "lt;Controlgt;a" or "lt;Shiftgt;lt;Altgt;F1". The parser is fairly liberal and allows lower or upper case, and also abbreviations such as "lt;Ctlgt;" and "lt;Ctrlgt;". If you set the option to the special string "disabled", then there will be no keybinding for this action.
Kiibaịndịn ahụ nke na-ebido ntiiiwu ọnụọgụgụ na-adaba adaba na /apps/metacity/keybinding_commands Ọdịdị ahụ dị̀kà "lt;Controlgt;a" mọọbụ"lt;Shiftgt;lt;Altgt;F1".Ọtọsa ngwe dị̀ líbrààlụ̀ ma hapụ kéèsì nke ala mọọbụ nke elu, ya na inwe mkpọbiri aha dịka "lt;Ctlgt;" na "lt;Ctrlgt;" Ọ bụrụ n'ihazie ihenhọrọ niile ahụ n'ahịrịokwu pụrụ iche "disabled", mgbe ahụ agaghị enwe kiibaịndịn maka mmem a.