liquefaction of coal

例句：

1. 1.The process of liquefaction iscrucial in the oil industry.
   液化过程在石油工业中至关重要。
2. 2. The liquefaction of coal has significant environmental impacts.
   煤炭的液化对环境有重大影响。
3. 3.The liquefaction of coal canbe used to produce clean energy.
   煤炭的液化可以用于生产清洁能源。