折叠式文件袋
/ˈbɒtəm ˈfeɪs/
n
English: bottom-fold portfolio · 折叠式文件袋
English · bottom-fold portfolioEspañol · cartera de fondo plegableFrançais · porte-documents à soufflet
释义：Briefcase with a handle; its sides expand to accommodate more documents or books.