n. a case with a handle; for carrying papers or files or books
n. 公事包
1. He carried his laptop in a black briefcase.
他把笔记本电脑放在一个黑色公文包里。
2. She opened her briefcase to find the documents inside.
她打开公文包，想找里面的文件。
3. The businessman placed his briefcase on the table.
商人把他的公文包放在桌子上。