VOA标准英语2008年-High Definition Eye Glasses Provide Crisper Vis_在线英语听力室

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By Carol Pearson
Washington
05 May 2008

High definition TV provides sharper images, but high definition imaging now goes beyond television. VOA's Carol Pearson reports on high definition eye glasses.

在线英语听力室_免费在线英语听力学习网站

VOA标准英语2008年-High Definition Eye Glasses Provide Crisper Vis