hydrogenation of coal

例句：

1. 1. The process of hydrogenation is used to make plastics and other synthetic materials.
   氢化过程用于制造塑料和其他合成材料。
2. 2. Hydrogenation is a chemical reaction that occurs when hydrogen gas is added to a liquid orsolid substance.
   氢化是一种化学反应，当氢气气体被添加到液体或固体物质时会发生。
3. 3. During the hydrogenation process, the oil is heated and mixed with hydrogen gas to produce a new compound.
   在氢化过程中，油被加热并与氢气混合以产生一种新的化合物。