coaling stage

例句：

1. 1. The coaling stage is critical for the operation ofthe power plant.
   燃煤阶段对电厂的运行至关重要。
2. 2. During the coaling stage, thecoal is loaded onto the ship and thentransferred to the furnace.
   在装煤阶段，煤炭被装载到船上，然后转移到炉膛。
3. 3. The coaling stage is acrucial step in the process of convertingraw materials into finished products.
   燃煤阶段是将原材料转化为成品过程中的关键步骤。