burning front

例句：

1. 1. The soldiers were fightingon the burning front.
   士兵们在燃烧的前线作战。
2. 2. The firefighters bravedthe burning front to save the people.
   消防员勇敢地冲向燃烧的前线，拯救了人们。
3. 3. The war was atits burning front.
   战争正处于最激烈的阶段。