crude naphthalene

例句：

1. 1. Crude naphthalene is a byproduct of the petroleum refining process.
   粗萘是石油精炼过程中的一个副产品。
2. 2.The crude naphthalene was used as a solvent in the manufacturing of synthetic rubber.
   粗萘被用作合成橡胶的溶剂。
3. 3.Due to its high purity, crude naphthalene is highly valued for industrial applications.
   由于其纯度高，粗萘在工业应用中价值很高。