flare stack

例句：

1. 1. The engineer used a flame stack to control the temperature of the furnace.
   工程师使用火焰堆来控制炉温。
2. 2. The pyrotechnics were designed to create a spectacular display during the fireworks show.
   烟花设计用于在焰火表演中创造壮观的展示。
3. 3. Firestacks are used in power plants to generate electricity by burning coal or other fuels.
   火堆被用于发电厂，通过燃烧煤炭或其他燃料来产生电力。