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Researchers transformed 2D kaolinite into 3D amorphous cement using chemical reactions in an alkaline medium. This breakthrough creates a sustainable, CO2-free alternative to traditional cement, ...

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Despite a more widespread shift toward product recyclability, these types of linear systems are still especially prevalent in ...

为了确保Word文档在不同设备和软件环境中保持一致的格式和可读性，我们可以将其转换为PDF格式。这样不仅可以避免版本不兼容或字体缺失导致的格式问题，还能保护文档的原始布局、字体和图像不被随意更改。PDF格式还便于文档的分享、打印和存档。那么，如何在电 ...

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An airplane drops fire retardant as firefighters battle Franklin fire on Dec. 10 in Malibu. (Brian van der Brug / Los Angeles Times) ...