Browsing Brazilian Portuguese translation

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\screenshot{02-help-center.png}{ss:help-center}{The built-in system help provides topic-based help for Ubuntu.} If you can't find an answer to your question in this manual or in the \application{Ubuntu Desktop Guide}, you can contact the Ubuntu community through the Ubuntu Forums (\url{http://ubuntuforums.org}). \marginnote{We encourage you to check any information you find on other websites with multiple sources when possible, but only follow directions if you understand them completely.} Many Ubuntu users open an account on the forums to receive help, and in turn provide support to others as they gain more knowledge. Another useful resource is the Ubuntu Wiki (\url{https://wiki.ubuntu.com}), a website maintained by the Ubuntu community.