petroleum paraffin

例句：

1. 1. The petroleum paraffin is used in the production of lubricants.
   石油石蜡用于生产润滑油。
2. 2. Petroleum paraffin is a solid at room temperature.
   石油石蜡在室温下是固体。
3. 3. The petroleum paraffin was extracted from crude oil.
   石油石蜡是从原油中提取出来的。