cover the retreat

例句：

1. 1. Thesoldiers retreated to the safety of theirfortress.
   士兵们撤退到他们的堡垒里。
2. 2. The company decided to retreat from themarket.
   公司决定从市场上撤退。
3. 3. The teamretreated to a safer location before regrouping.
   团队在重新组织之前撤退到一个更安全的地方。