工人正在焚烧杂草来清理建筑工地。

Workers are ___burning-off weeds to clear the construction site.

农民们在冬季进行控制燃烧以减少野火风险。

Farmers performed a ___burn-off in winter to reduce wildfire risks.

工厂通过燃烧处理多余的燃料。

The factory uses ___burn-off to dispose of excess fuel.