Is this a duplicate or the original?

这是副本还是正本？

《牛津词典》

He let himself in with a duplicate key.

他用一把另配的钥匙打开门进去了。

《柯林斯英汉双解大词典》

I'm on my way to Switzerland, but I've lost my card. I've got to get a duplicate.

我在去瑞士的路上，但是我的卡丢了。我得弄张补发卡。

《柯林斯英汉双解大词典》

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

Come Judgement Day, we've got a duplicate of the-- but we don't have-- me.

审判日到来时，我们看到的是复制品-,但并不是原来的那个我。

耶鲁公开课 - 死亡课程节选

I would never wish to duplicate that, however, I think there's a take-away.

我不会再来一次，但是，我想人们应该从中得到些什么。

普林斯顿公开课 - 人性课程节选

Of roughly 70, 000 names examined to date, approximately one in ten was a duplicate.

CENTERFORSECURITYPOLICY: Center for Security Policy | Now It��s Time To Ensure That Democracy Actually Prevails In Nicaragua

That is not to say that the son became a duplicate of his father's personality.

CNN: Excerpt: 'The Prince of Tennessee: The Rise of Al Gore'

Xerox built machines that scanned a printed page of type using a photographic lens, and then printed a duplicate.

NEWYORKER: Creation Myth