苦差事

例句：

1. 1. He had to do a lot of work for the company as a part-time student.
   他作为兼职学生不得不为公司做很多工作。
2. 2. She was assigned to help out with the construction project during her spare time.
   她被分配在空闲时间帮助进行建设项目。
3. 3. The teacher asked the students to help each other out in their studies.
   老师要求学生们互相帮助学习。