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单语范例（未经PONS编辑处理）
Software bytes are presented to a terminal as pairs of standard teletext characters, thus utilizing an existing and well-proven broadcasting system.
en.wikipedia.org Teletext ended in each region after analogue broadcasts finished.
en.wikipedia.org Some teletext services use a great number of lines, others, for reasons of bandwidth and technical issues, use fewer.
en.wikipedia.org The programme was separate from the auxiliary and separately-licensed teletext service also available on the channel.
en.wikipedia.org A close relative is teletext, which sends data in one direction only, typically encoded in a television signal.
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