The debris, which came from an asteroid that was once 125 miles long, showed little carbon and high levels of calcium and iron.
碎片来自125英里长的小游星,由微弱的碳和大量钙、铁组成。
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The rods are made from thermoplastic carbon-fibre composite, which has a high tensile strength that rivals traditional building materials like steel and iron, and could help to reinforce the building.