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采用多媒体视频授课，图像、声音、文字同步传输，体验完美虚拟课堂！
Video, picture, sound and text transmitted simultaneously for a perfect Virtual classroom!
youdao
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采用多媒体视频授课，图像、声音、文字同步传输，体验完美虚拟课堂！
Video, picture, sound and text transmitted simultaneously for a perfect Virtual classroom!
youdao