join forces

例句：

1. 1.The two companies decided to join forces and form a joint venture.
   两家公司决定联合起来成立一家合资企业。
2. 2. The leaders of the two countries have been trying to join forces to address global challenges.
   两国领导人一直在试图联合起来应对全球挑战。
3. 3. After years of conflict, the two nations finally joined forces to rebuild their relationship.
   经过多年的冲突，两国最终联合起来重建了他们的关系。