📁 Message委员会
Message boards or discussion forums are usually the main aspect of an online (virtual) community where one can interact with other people of similar interests by posting and replying to messages, in your own time. This usually results in higher quality of discussions than with real-time chat.
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Videos for the Web with HTML 5 - an Introduction
http://www.elstel.org/html5video/FlashVersusHtml5Video.html.en