Boston bag

例句：

1. 1. He packed his bags and left for the airport early this morning.
   他今天早上很早就打包行李，准备去机场。
2. 2.She carried her laptop and books in a Boston bag.
   她用一个波士顿包携带她的笔记本电脑和书籍。
3. 3. The student bought a Boston bag as a gift for his friend.
   这个学生买了一个波士顿包作为礼物送给他的一个朋友。