1 . The best uses of 3D printers and ________ (虚拟) reality haven’t been invented yet. (根据汉语提示单词拼写)
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2 . Some users worry that they are spending so much time in _________ (虚拟的)worlds that they are becoming afraid of meeting people in the real world. (根据汉语提示单词拼写)
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