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Perseverance is also key to success in any endeavor, but without perseverance in combat, there can be no victory. - Jocko Willink The important thing in life is not victory but combat; it is not to have vanquished but to have fought well. - Pierre de Coubertin I exhort you also to take part in the great combat, which is the combat of life, and greater than every other earthly conflict. - Plato
新冠肺炎, 病毒, 研究, 疫苗, 药品, 技术, 技术趋势, 保留技术, 如何使用, 生产过程
非动画 1长宽比（4：3） 图像占位符 易于编辑的数据驱动图表（饼图，条形图，折线图）
形状和文字是100％可编辑的 将图片替换为占位符 使用的免费字体 预制的颜色变化
轻松定制 100％完全可编辑的PowerPoint幻灯片 容易改变颜色 演示照片包括在内；
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