奋战的英文：
fight courageously

They died in their boots(shoes), and hardly ever surrendered
他们都奋战而死，无人投降。

After continuous hard work they at last completed the task.
经过连续奋战,他们终于完成了任务。

After continuous hard work, they at last completed the task.
经过连续奋战，他们终于完成了任务。

By myself I’d have been run off my legs, and still wouldn’t have saved the corn
如果我孤身奋战，即使把腿跑断，也还是保不住这些玉米。