灰烬的

He flicked ash from his cigaret onto the cobblestones.

把香烟的灰烬弹到鹅卵石上。

The National Ready Mixed Concrete Association points out that using ashing sumach ash in cement is not a new idea.

国际预拌混凝土协会指出，在水泥中使用灰烬并不是新的方法。