Most recognizable of the ship designs are the ship's smoke stacks, but the fourth stack was actually just artistic in nature and served no functional purpose.

烟囱是船舶最容易辨认的设计，但其实，第四个烟囱只有装饰美化作用，并没有任何的实际功能。

youdao

Smoke stacks are seen at a coal power plant in West Virginia.

图中所见为西弗吉尼亚州燃煤电厂的烟囱。

youdao

If they came to our planet, they would always stay near smoke stacks.

如果他们来到地球，他们就会一直待在烟筒附近。

youdao

It actually began to occur long before humans invented agriculture, smoke stacks, and gasoline-fueled internal combustion engines.

FORBES: Gullible Warming: A Contrived Crisis That Is Too Good To Waste

It actually began to occur even before the advent of flatulent dinosaurs, industrial smoke stacks and SUVs.

FORBES: Climate Obstinately Refuses to Cooperate with Global Warming Alarmists

Old New York, with its brawling bar rooms, smoke stacks and fervent hopes for a better life, has become the next big thing.

BBC: Brand new old New York