公文包

例句：

1. 1. He carried his briefcase in his hand and walked into the conference room.
   他手拿手提箱走进会议室。
2. 2. The secretary handed out the documents to each employee.
   秘书将文件分发给每位员工。
3. 3. She put her laptop in her backpack and headed for the train station.
   她把笔记本电脑放进背包，准备去火车站。