big-size lump coal的用法和样例：
- May be used in iced coal or lump coal with a certain thickness.
- It is the focus problem for anthracitic coal production enterprise to increase percentage of lump coal and reduce amount of lump coal with size smaller than lower size limit.
- An apple sized lump was lodged in my throat.
- You also need to bring a big size towel and yoga mat.
- To honor an order of big size like yours, it's beyond our financial capability.
- Some plants have successfully revamped fixed-bed lump coal gasifier into shaped-coal gasifier and benefits a lot.