他请求那位老人照看这个公事包.He requested the old man to look after the briefcase.我关不上公事包.I can't shut my briefcase.是的, 1个公事包 、 1个旅行行李袋和1个手提箱.Yes, a briefcase, a travelling bag and a suitcase....

“公事包”的英语可以翻译为：attache case，brief，briefcase ...