extractors

例句：

1. 1. The machine is designed to extract oil from the earth.
   这台机器被设计用来从地下提取石油。
2. 2. The engineers are using a new type of extractor to improve efficiency.
   工程师们正在使用一种新型的提取器来提高效率。
3. 3. The researchers found that the extractor could effectively remove impurities from the sample.
   研究人员发现，这种提取器能有效去除样本中的杂质。