cinder aggregate

例句：

1. 1.The factory uses cinder aggregate to make bricks.
   这家工厂使用煤渣来生产砖块。
2. 2.Cinder aggregate is a byproduct of coal mining.
   煤渣是煤炭开采的副产品。
3. 3. The cinder aggregate was used to level the road.
   煤渣被用来平整道路。