crude tar oil

例句：

1. 1. The refinery produces a variety of products from crude tar oil.
   炼油厂从原油中生产出各种产品。
2. 2.Crude oil is a valuable resource that can be refined into various chemicals.
   原油是一种宝贵的资源，可以提炼成各种化学品。
3. 3.The extraction process requires careful monitoring to ensure the quality of crude tar oil.
   提取过程需要仔细监控，以确保原油的质量。