浓烟

gǔn gǔn nóng yān cóng yān cōng zhōng pēn yǒng ér chū

滚滚浓烟从烟囱中喷涌而出。

A great cloud of smoke billowed out of the chimney.

fā dòng jī zài mào nóng yān

发动机在冒浓烟。

There was dense smoke pouring from engine.