“煤灰”的拼音？

“煤灰”的英语可以翻译为：coom，coal ash，coal ash and slag ...

马修擦掉了脸上的煤灰。Matthew scrubbed the coal dust from his face.他们满脸煤灰。Their faces were blackened with soot.他的脸和双手都沾满了煤灰和污垢.His face and hands were coverd with grime from the coal dust....