Without a reference, you copy the entire array or hash onto the function call stack, and then copy it again in the function.

如果不使用引用，就需要将整个数组或 hash 表复制到该函数的调用栈中，然后在函数中再次对其进行复制。

youdao

To avoid this aliasing effect, you need to call the built-in copy function to duplicate the list, and then assign the copy instead.

为了避免别名效应，您需要调用内置的copy函数来复制列表，然后改为对副本进行赋值。

youdao

For example, a copy function should be implemented with a Ctrl-C shortcut, named copy, and given a tooltip of copy.

比如，复制功能应该使用快捷键Ctrl - c(称为Copy)实现，而且提供了一个Copy工具提示。

youdao

to do sqrt, or square root-- no, I'm going to square root use sqrt, that's the name I'm using here-- square root a hundred different places in some piece of code. Without function, I'd have to copy that piece of code everywhere.

让我做一下准备,想象一下我要调用sqrt或者-,不，我会调用sqrt函数,这是我在这里用的名字，我得把这段代码到处复制。

麻省理工公开课 - 计算机科学及编程导论课程节选

Sales of color-laser printers and multi-function devices that copy, print, scan and fax, have provided growth spurts, even as traditional black-and-white printing and copying shrinks.

FORBES: Did You See "Office Space"? The Printer Scene? Read On

As Daily Tech points out, this seems to suggest that any Vista upgrade DVD can function as a full retail copy of Vista, although it would also seem to be something that Microsoft could put the kibosh on pretty quickly, so you may not want to lose sight of that copy of your old OS just yet.

ENGADGET: Clean install workaround for Vista upgrade discovered