functional group of coal

例句：

1. 1. The functional group of coal is crucial for the operation of power plants.
   煤炭功能组对于电厂的运行至关重要。
2. 2. The coal functional group is responsible for the production of electricity.
   煤炭功能组负责电力的生产。
3. 3. The functional group of coal plays a vital role in reducing carbon emissions.
   煤炭功能组在减少碳排放方面起着重要作用。