preburnish

例句：

1. 1. Before the firefighters arrived, we had to preburn the area to prevent any accidents.
   消防员到来之前，我们必须预先燃烧该区域以防止任何事故。
2. 2. The engineers were preburnishing the metal before it was sent to the machine shop for machining.
   工程师们在将金属送往机器车间进行加工之前，先对其进行了预烧处理。
3. 3. The pilot had to preburnish the engine before taking off to ensure a smooth start.
   飞行员在起飞前必须对引擎进行预烧处理，以确保平稳启动。