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An animated sequence quantised using error-diffusion dithering. Note the jittering artifacts present in the background.
2. 老年教育与文化娱乐： 老年大学、社区艺术培训及适配老年人的数字娱乐内容开发。通过简洁易用的社交平台或虚拟旅游体验，帮助老年人跨越数字鸿沟，消除孤独感 [4, 39]。
Scientists have discovered that an annual event when Emperor penguins completely shed and regrow their feathers is putting the birds in peril as Antarctica is transformed by a warming world.