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1. The scientist used a special processto purify the cobalt fromthe ore.
这位科学家使用了一种特殊的工艺来从矿石中提炼出钴。
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2. Cobalt is an important element in theproduction of steel, as it helps toimprove its strength and hardness.
钴在钢铁生产中非常重要，因为它有助于提高钢的强度和硬度。
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3. The purity of the cobalt was crucial for the successof the project, as it directlyaffected the quality of the final product.
钴的纯度对于项目的成败至关重要，因为它直接影响了最终产品的质量。