树敌

例句：

1. 1. He was determined to defeat his enemy at all costs.
   他决心不惜一切代价击败敌人。
2. 2. The two countries have been at war for decades, with a long history of mutual hostility.
   这两个国家已经打了几十年的仗，有着长期的敌对历史。
3. 3. They are now on the same side, working together to defeat their common enemy.
   他们现在站在同一边，共同努力击败共同的敌人。