At the end of a successful XML tree walk, this function will convert and store all the XML elements (the root element and all the child elements) in a PHP associative array.

成功遍历xml树之后，该函数就用PHP关联数组转换和存储了所有的XML元素(根元素和所有的孩子元素)。

youdao

While the xmlrow output is the sequence of the row values represented as XML, the xmlgroup function groups all the values under a root node.

xmlrow输出是一个表示为xml的行值的序列，xmlgroup函数将所有值集合到一个根节点下。

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Because the root file system is a file system on a disk, the initrd function provides a means of bootstrapping to gain access to the disk and mount the real root file system.

由于根文件系统是磁盘上的一个文件系统，因此initrd函数会提供一种启动方法来获得对磁盘的访问，并挂载真正的根文件系统。

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

Equity returns before valuation adjustments are a function of earnings growth (which have their root in GDP growth) and dividend yield including stock buybacks.

FORBES: The Next 10 Years