You should make a copy of the disk as a backup.

你应该将磁盘复制一个备份。

《牛津词典》

I bought a copy of "USA Today" from a street-corner machine.

我从售货机上买了一份《今日美国》。

《柯林斯英汉双解大词典》

A hard copy of the screen display can also be obtained from a printer.

屏幕显示的硬拷贝也可从打印机那里获得。

《柯林斯英汉双解大词典》

But the researchers did much of their work with a phureja, a kind of a potato that has only one copy.

VOA: special.2009.10.20

So this is a classic error. I've not made a copy of the list. I've got an alias of the list.

这是个相当经典的错误,在这里我并没有得到数组的。

麻省理工公开课 - 计算机科学及编程导论课程节选

If you want to control a program file, open, copy, paste not get me ready for my trip to Stanford.

如果想要掌控一项程序文件，打开，复制粘贴，并不会铺平通向斯坦福的路。

斯坦福公开课 - 微软CEO-Steve.Ballmer谈科技的未来课程节选

To do so, a candidate would be required to show a copy of a birth certificate.

FORBES: Arizona Birther Bill Awaits Governor's Signature Into Law

If I had a choice between a hard copy and a link, I'd take the link.

WSJ: The Improbable Rise of NPR Music

In Saving Private Ryan a general reads a copy of this famously inspiring missive.

FORBES: Gold in The Sofa Cushion