cost ash

• 煤灰

cost ash的用法和样例：

例句

1. Billions of gallons of coal ash, of course, spill through this area after a broken dam occurred in Knoxville last week.
   上周诺克斯维尔一个水坝毁坏，数十亿加仑的煤灰倾泻到这个区域。
2. She spent her days hunting in the ash heaps for half-burnt coal-balls to take home for fuel.
   她整天在煤灰堆捡煤核，拿回家去烧。