联合作业

例句：

1. 1. The team worked together to complete the project successfully.
   团队共同努力成功完成了这个项目。
2. 2. They conducted a joint operation to save the villagers from danger.
   他们进行了一次联合行动，拯救了村民免受危险。
3. 3. The students participated in a joint study group to improve their understanding of the subject.
   学生们参加了一个联合学习小组，以提高他们对这门学科的理解。