laminar flames

例句：

1. 1. The laminarflames were visible from the observation deck.
   从观景台上可以看到层流火焰。
2. 2. Thelaminar flames were a signof good air quality.
   层流火焰是空气质量良好的标志。
3. 3. The laminar flameswere used to study the behavior of fluids in pipes.
   层流火焰被用来研究流体在管道中的行为。