in duplicate

基本解释

This agreement is done in duplicate.
本协议书一式两份。
《新英汉大辞典》
Please sign a copy of our Sales Contract No.156 enclosed here in duplicate and return to us for our file.
请会签第156号销售合同一式两份中的一份，将它寄回我方存档。
Drafts in duplicate at sight bearing the clauses “Drawn under Bank of China, Hongkong L/C No. 198393 dated July.17,2004”.
即期汇票一式二份，注明“根据中国银行香港分行信用证198393号，日期2004年7月17日开具”。

Supporters are tryingto duplicate successes in Europe, especially Germany.
But in the science fiction story where there's a duplicate,it says, if there's branching,the no branching rule comes in.
但在科幻作品里，复制的案例是存在的，分裂出现时，在无分支的规定下。
耶鲁公开课 - 死亡课程节选
Shelly Kagan Whether I,this person talking to you right now, is Shelly Kagan depends on whether there's some duplicate with all my memories in Michigan or not?
现在和你们讲话的人是不是，取决于是否在密歇根有没有一个,带有我的记忆的复制品存在？
耶鲁公开课 - 死亡课程节选

"There are some obstacles we need to overcome in duplicate detection and captchas, " he says.
FORBES: Social Media

(of the parts of a bud) bent or folded inwards with the edges touching but not overlapping