The application has to be completed in triplicate, with the original being kept by the bank and the copies going to the customer and the tax office.申请书必须一式三份，原件由银行保管，复印件留给顾客和税务部门。Applications must be made out in triplicate.申请书必须填写一式三份。I typed the letter in triplicate.我把信打成一式三份。Fill in the form in triplicate.将本表格填写一式三份。Some petty bureaucrat wanted all the documents in triplicate.有些小官僚就希望所有文件都一式三份。File the forms in triplicate.将表格一式三份归档。