The iteration structure defines the existing development lines and the break down of the development lines into iterations.

迭代结构定义现有的开发线(development line)，并将开发线分解为各个迭代。

One very likely use is as a replacement for passing a cumbersome number of parameters to the stylesheet. You can break a string into lines of text using the following code.

一种很有可能的用法是代替向样式表传递大量的参数。

It has been redacted to break the long URL into several lines for readability.

编写时为了具有可读性，把一个长的UR l断开成了若干行。

We must also remember not to break the literal string into separate lines, unless the string we are comparing to is similarly broken.

我们也必须记住，不要把文字字符串分行，除非我比较的字符串有同样的分行。