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Only two things are infinite, the universe and human stupidity, and I'm not sure about the former. -Albert Einstein Look at the sky. We are not alone. The whole universe is friendly to us and conspires only to give the best to those who dream and work. -A. P. J. Abdul Kalam
易于编辑的数据驱动图表（饼图，条形图，折线图） 长宽比为16：9 聪明创新的演示幻灯片 轻松换色 基于主幻灯片的现代布局 拖放图像占位符
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