The machine emits clouds of gray smoke.

这台机器释放出灰色的烟雾。

youdao

The flame went out in a puff of gray smoke.

火焰在一个灰色的烟雾吹出去。

youdao

Unrelated to the cloud cover, a dull gray smoke plume appears east of Alaska.

接下来的内容与云层无关，在阿拉斯加以东有一片浅灰色的烟雾。

youdao

The flame went out in a puff of gray smoke.

VOA: special.2010.05.01

A large fire then broke out, engulfing several shops and spewing a cloud of gray smoke over the area.

VOA: standard.2009.10.28

A blue-gray haze from natural and now manmade sources hangs over them like smoke.

VOA: special.2009.09.28

Artillery set a four-story house in Aracinovo on fire, blanketing the eastern part of the village with heavy gray smoke.

CNN: Residents flee Macedonian fighting

Despite our growing up among the gray, smoke-belching factories of northern New Jersey, you somehow grasped the beauty and stillness of nature.

FORBES: Dear Dad, With Love

It was replaced by a gray lull, all smoke and pig iron.

NEWYORKER: Something Like Happy