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时间:2019-03-06 04:04:01166网络整理admin

Trying to read an unwieldy newspaper on a crowded train is tricky—and annoy your fellow passengers. But researchers at the Xerox Palo Alto Research Center in California have the answer. They say a newspaper could be beamed by radio to a 40-centimetre wide plastic rod called a “newsreader”. Inside the rod is a coiled transparent rubber sheet coated with plastic. The sheet contains millions of microscopic metal balls in oil-filled cavities,