Smoke had blackened the walls.

烟把墙壁都熏黑了。

Their faces were blackened with soot.

他们满脸煤灰。

There was a row of brick houses, blackened by smoke.

那里有一排砖房，全被烟熏黑了。

Slowly, very slowly, they blackened and turned to ashes.

慢慢地，非常缓慢地，它们变黑了，变成了灰烬。

The kitchen walls are blackened by smoke.

烟把厨房的墙壁熏黑了。