He duplicated his former mistakes.
他又犯了和以前一样的错误.
This is a duplicate.
这是一个副本。
Don't duplicate what you already do.
不要重复你已经在做的工作。
Is this a duplicate or the original?
这是副本还是正本？
This painting is a duplicate of the original artwork.
这幅画是原作的复制品。
She copied her friend's homework, but it was quickly detected as a duplicate.
她抄袭了朋友的作业，但很快被发现是重复的。
The hotel provided a duplicate key in case we lost our room key.
酒店提供了一把备用钥匙以防我们丢失房卡。
The library had a duplicate copy of the rare book, which was a relief for researchers.
图书馆有一本罕见书籍的副本，这让研究者松了一口气。
He ordered a duplicate of his birth certificate from the government office.
他从政府办公室订购了一份出生证明的副本。
A duplicate passport was issued to the traveler after their original one was damaged.
旅行者的护照损坏后，他们得到了一份副本。
The IT department made a duplicate of the database to ensure data security. (IT部门复制了数据库以保证数据安全。
She kept a duplicate set of house keys just in case.
她保留了一套备用钥匙以防万一。
The duplicate keys were found in the drawer where she always kept them.
那些备用钥匙被发现在她常放的地方抽屉里。
The software has a feature that allows users to create duplicate files for backup purposes.
该软件有一个功能，用户可以创建文件副本用于备份。
"We hope the new store to improve our offline service capability and standard, which will allow us to duplicate the experience of Freshippo and enhance the overall offline service quality of Freshippo," according to Ge Dongsheng, general manager of Shanghai regional operations with Freshippo.
Freshippo上海区域运营总经理葛东生表示：“我们希望新店能提高我们的线下服务能力和标准，这将使我们能够复制Freshippos的体验，提高Freshipo的整体线下服务质量。”。
Asked for more details, Marriott spokesman Jeff Flaherty said Friday that the company has not finished identifying duplicate information in the database.
"But an increasing number of imitations and duplicates are posing problems for tourists and imposing a reputation pressure on the tourism authorities.
China Reform Holdings Corp, a government-backed investment firm, holds 6 percent of China Tower Corp. China Tower Corp, a joint venture created in 2014 to handle the tower assets of the country's top three telecom carriers, is designed to reduce duplicate construction and expenditure, as the country rolls out faster networks.
The retailer is trying to edit down its assortment to reduce clutter and remove items that duplicate each other.
In addition, project operators shall not be required to provide duplicate documents that can be obtained by mutual recognition and sharing of data via Government Online-Offline Shanghai.
This will enable enterprises to begin construction immediately after obtaining a land-use permit, without the need for duplicate assessments.
However, it has been really hard to duplicate the Palace Museum's success, and many companies have faced problems, especially their inability to create a strong IP and develop a wide range of products around it.