Herewith we are sending you a written contract under seal in two copies.

兹寄上盖有印章的契约一式两份。

《新英汉大辞典》

Certificate of acceptance of contract product quality signed by both parties in two copies.

由双方签署的合同产品考核验收合格证书一式两份。

youdao

Each parcel of Technical Documentation shall enclose a list of detailed contents in two copies.

每包技术资料内应附详细清单二份。

youdao

Publisher Simon and Schuster says it has sold two hundred million copies of Nancy Drew books in twenty-five languages around the world.

VOA: special.2009.08.24

And when you call a function, one of the things X that happens is whatever your passing in, for instance, X, ; and if this is A, this thing gets copied into A; so at that moment in time of calling increment, I actually have two copies of the same value in memory but they're referred to by different names.

当你调用一个函数，其中发生的一件事情是,不管你输入什么，比如，或者是A，它把这个东西复制到A中;,调用increment的时候，实际上在内存中，有两个同样的值的内存块,但是它们有不同的名字。

哈佛公开课 - 计算机科学课程节选

The Recording Industry Association of America marked the sale of three million copies in the United States as of two thousand two.

VOA: special.2010.10.18

There is no scope for plots in which two copies of Kirk roam the universe until they meet in a dreadful epiphany: in quantum teleportation, the original copy of Kirk is destroyed by the very process of being entangled with the transporter.

ECONOMIST: Don��t look now, I��m teleporting

The original is now in an institution, and the folds in two known copies differed from one another, a clear sign that facsimiles were involved.

FORBES: Connect

Both drugs are being tested in patients who have two copies of a genetic mutation called F508del.

FORBES: Personalized Cystic Fibrosis Drugs Get A Booster Shot