threesider

例句：

1. 1. He is a threesider who juggles work, family, and personal life.
   他是一个三面人，需要在工作、家庭和个人生活之间平衡。
2. 2.The threesider had to coordinate with all three parties involved in the project.
   这个三面人必须协调所有三个参与项目方的工作。
3. 3.Threesiders are often faced with challenges when trying to balance multiple responsibilities.
   三面人在尝试平衡多重责任时常常面临挑战。