a sales department还是a sale department?

a sales department还是a sale department? department 英语翻译the commerce department said sales fell by 11.3% to a se John tried hard to find a job in the sales department,but he The sales department used to be a guy next to the phone wait a department store,there,is marketing and sales Department什么意思 at the department store还是in the department store 关于英语的知识请问sales department,production department,marketing de It even has a fire department(消防队）怎么翻译 英语翻译The training department offers a wide range of programs, 2.In Foreign Languages Department,a checking machine is used