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The earth is the mother of all people, and all people should have equal rights upon it. -Chief Joseph There should be no discrimination against languages people speak, skin color, or religion. - Malala Yousafzai
轻松定制 100%完全可编辑的PowerPoint幻灯片 快速轻松地自定义 形状:完全可编辑的矢量图形 深色和浅色背景 宽高比-4:3(正常),16:9(宽屏)
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