SUM函数

虽然我只包括了max/min、average和sum函数，我仍能想象得到有人如何雄心勃勃地想要组合成一个完整的电子表格插件，其中包含microsoftexcel应用程序内的所有函数。

Though I have only included the max / min , average , and sum functions , I can picture someone who 's quite ambitious putting together an entire spreadsheet plug-in , which includes every function found in the Microsoft Excel application .

将调用XPath库函数sum，该函数将返回生成的节点集所包含全部节点（元素）的和。

The XPath library function sum is called , which returns the sum of all nodes ( elements ) contained in the generated node-set .

XPath也有一个sum（）函数，它以匹配节点的内容作为参数，将这些参数转换成数值，并返回这些值的和。

XPath also has a sum () function , which will take the contents of the matching nodes , convert them to numeric values , and return the sum of those values .