That generally is just modifying a few bytes, a few kilobytes worth of information.

这个操作通常只是修改了几个，或者几千字节的有价值的信息。

哈佛公开课 - 计算机科学课程节选

And it boils down to modifying the format string with just a simple number.

它归结于是用一个简单的数字来,修改字符串的格式。

哈佛公开课 - 计算机科学课程节选