1. The soldiers built sturdy redoubts to defend against enemy attacks.
士兵们建造了坚固的碉堡来抵御敌人的进攻。

2. The rebels used the ancient ruins as redoubts to hide from the authorities.
叛乱分子利用古老的废墟作为避难所，躲避当局的追捕。

3. The castle's towers served as redoubts for the archers during the siege.
城堡的塔楼为弓箭手在围攻期间提供了防御据点。

4. The mountain pass was a natural redoubt, making it difficult for enemy forces to advance.
山口是一个天然的据点，使得敌军难以前进。

5. The rebels fortified their redoubts with barricades and traps to protect themselves.
叛军用 barricades 和陷阱加固了他们的据点，以保护自己。

6. The general strategically placed redoubts along the river to prevent the enemy from crossing.
将军在河边策略性地设立了据点，防止敌人过河。