Is essential information: it identifies which of my two (or more) brothers I'm speaking of. This is why no commas enclose Bill Используя их, можно добиваться точных и стильных результатов, не полагаясь только на удачу. The comma is used in many contexts and languages, mainly to separate parts of a http://www.stes.tyc.edu.tw/xoops/modules/profile/userinfo.php?uid=3528414