The car engine smoke points three: white smoke, black smoke and blue smoke (in diesel vehicles, for example).

汽车发动机冒烟分三种：白烟、黑烟和蓝烟(以柴油车为例)。

youdao

This indicates that smaller drops of L30 are more than those of diesel, spray quality is good, and engine smoke reduces accordingly.

说明L 30喷雾所产生的小颗粒液滴多于柴油，雾化质量提高，碳烟排放得以大幅度降低。

youdao

It is revealed by a great amount of test and research work that there is a significant effect of atmospheric temperature and atmospheric pressure on Diesel engine smoke emission.

通过大量的试验研究，发现大气温度和大气压力对柴油机烟度排放有很大的影响。

youdao

Prairie landscapes from 1927 turn a train and tall grain elevators into minimal vertical and horizontal strokes, while roiling clouds and the engine's rising smoke prefigure familiar abstract elements.

WSJ: Clyfford Still Museum | Irascible Still | By Karen Wilkin

Tilley said her sister, Renee Shanar, of Houston, told her the cabins were hot and smelled like smoke from the engine fire, forcing passengers to stay on the deck.

NPR: Carnival Cancels 12 More Cruises On Troubled Ship

Under their balcony a bus stopped, brakes wheezing, its doors slapped open, then shut, engine roaring and sending up a plume of noxious smoke as it rumbled away.

NEWYORKER: Shauntrelle