"triplicate" in Chinese (Simplified)
三份三联件
Definition
指制作三份的文件或事物，常用于需要保存三份的文件。也可作动词，表示把某物复制三份。
Usage Notes (Chinese (Simplified))
常在正式、办公场合出现，如“请一式三份提交”。动词形式比较罕见，习惯用“复印三份”。作为名词或形容词较常见。
Examples
Please fill out this form in triplicate.
请把这份表格填写成**三份**。
We need the report in triplicate for the records.
我们需要**三份**报告存档。
The contract must be signed in triplicate.
合同需**三份**签署。
You only sent one copy? We needed these documents in triplicate!
你只发了一份？这些文件要**三份**的！
Our office requires all expense receipts in triplicate, just to be safe.
我们办公室要求所有报销单都要**三份**，以防万一。
Back then, everything from invoices to letters was done in triplicate—it was a pain.
那时，从发票到信件都是**三份**，真的很麻烦。