mixed coal

例句：

1. 1. The power plant uses mixed coal as a primary fuel source.
   这家电厂主要使用混合煤作为燃料来源。
2. 2. Mixed coal is often used in the production of steel and other metals.
   混合煤常用于钢铁和其他金属的生产。
3. 3. Due to its high energy content, mixed coal is considered a valuable resource for power generation.
   由于其高能量含量，混合煤被视为发电的重要资源。