名詞 briefcase:

1. a case with a handle; for carrying papers or files or books

1. He carried a leather briefcase embossed with his initials.
   他帶著一個飾有浮凸的姓名首字母的皮公事包。
2. The intruder lunged at me with a knife; I snatched up a briefcase to ward off the blow.
   闖入者持刀向我刺來，我急忙抓起一個公文包抵擋。
3. He put all the files into his briefcase.
   他將所有文件都裝進公文包。
4. They knocked him down and robbed him of his briefcase.
   他們把他打倒在地，搶走了他的公文包。

brief.case

n.（名詞）
A portable, often flat case with a handle, used for carrying papers or books.
公文包：可提攜的，通常扁平帶把手的包，用來裝文件或書

來源：
brief [document]
brief [文件]
case 2
case2