normal paraffin hydrocarbon

例句：

1. 1.The oil is extracted from the natural paraffin in the rock.
   这种油是从岩石中的天然石蜡中提取出来的。
2. 2. Paraffin is a common material used in manufacturing and as a lubricant.
   石蜡是一种常见的制造材料，也用作润滑油。
3. 3.Hydrocarbons are organic compounds that contain carbon and hydrogen atoms.
   氢碳化合物是含有碳和氢原子的有机化合物。