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After National Disabled Person's Day on May 21, a video released by CCTV featuring two graduate students from Beihang University and Tsinghua University has gone viral online. 在5月21日“全国助残日”之后，中央电视台发布的一段有关两位来自北航、清华的毕业生的视频，迅速在网上流传起来。 Wang Nana and Huang Shuang, intent on helping their hearing-impaired friends, invented a wearable sign-language interpreter by transforming sign language into audible information. 王娜娜和黄爽为了帮助自己听力受损的朋友，研究发明了一种能将手语转换为语音的翻译臂环。 The pair won first prize last month in an open design challenge organized by the UN Development Program and tech giant Baidu. 她们还于上个月在联合国开发计划署和科技巨头百度公司共同举办的设计挑战大赛上夺得了冠军。 | 
