实现取消功能的驱动程序需要实现函数。

A driver which implements cancellation needs to implement a function for that purpose.

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我们将为您提供分步指导，使您能够亲自实现函数索引。

We provide step-by-step instructions on how you can implement the functional index yourself.

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该插件解析器的实现函数的大部分是有一个简单的返回语句组成的。

Most of this plug-in parser's implementation functions consist of a simple return statement.

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Someone-- or someone had to implement, had to write a tool called printf that itself takes input between quotes and produces as output some characters on the screen.

需要有人去实现，这个printf函数,以双引号间的信息为输入,输出相应字母到屏幕上。

哈佛公开课 - 计算机科学课程节选

So pictorially, it's as though there's now some other part of the blackboard here, maybe way up here where I can put anything I want that's accessible to main, that's accessible to swap, that's accessible to increment or any other function I might implement because it is, in fact, global.

绘画般地，它是在这里黑板上的其他部分,可能在这里的上面,我在哪里可以放置这些东西,使它们可以被main函数使用，可以被swap函数使用，可以被increment函数使用,或者我所实现的其它函数,因为它实际上是一个全局变量。

哈佛公开课 - 计算机科学课程节选