size fraction of raw coal

例句：

1. 1. The size fraction of raw coal is an important factor influencing the efficiency of the power generation system.
   原煤的尺寸分数是影响发电系统效率的一个重要因素。
2. 2. The size fraction of raw coal plays a crucial role in determining the quality of the final product.
   原煤的尺寸分数在决定最终产品的质量中起着关键作用。
3. 3. The size fraction of raw coal can be used to optimize the energy conversion process and improve the overallefficiency of the power generation system.
   原煤的尺寸分数可以用来优化能量转换过程，提高发电系统的整体效率。