http://netvouz.com/bioinformatics/tag/english?feed=rss bioinformatics's bookmarks tagged "english" on Netvouz http://www.bbc.co.uk/worldservice/learningenglish/multimedia/the_teacher/index.shtml "... designed to make learning English idioms fun" bioinformatics Fri, 24 Oct 2008 14:43:39 GMT http://owl.english.purdue.edu/owl/resource/540/01/ This page "discusses the differences between indefinite articles (a/an) and definite articles (the)." bioinformatics Wed, 29 Sep 2010 16:04:28 GMT