extraction of copper

例句：

1. 1. The company's latest research has led to a new extraction method for oil.
   该公司的最新研究导致了一种新的石油提取方法。
2. 2.The scientist used the extraction method to extract valuable information from the ancient texts.
   科学家使用这种方法从古代文献中提取出有价值的信息。
3. 3. The extraction process is crucial in ensuring the quality of the final product.
   提取过程对于确保最终产品的质量至关重要。