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Researchers used a special laser 3D printing method to melt fake lunar soil into layers and fused it with a base surface to manufacture small, heat-resistant objects, potentially paving the way to more sustainable and cost-effective space missions, a new study suggests.
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A little recap of Hillary Clinton’s deposition from the committee yesterday: she repeatedly said she had never met Jeffrey Epstein to her knowledge, and she knew Ghislaine Maxwell casually, but she had no knowledge of their crimes.
“委员科学讲堂”是全国政协委员履职“服务为民”活动的一项重要内容，旨在发挥政协委员专业优势，为提高社会大众科学素质作出积极贡献。