Wikisource is arranged around an Index of Works and an Index of Authors which along with the search box helps us to drill down to any relevant text.
维基文库按照作品索引和作者索引排版，通过与搜索框一起使用可以帮助我们深入到任意相关文档。
The next two queries cannot use an index because an element "phone408" needs to be returned for every author, even if it is an empty element for authors outside the 408 area code.
下面两个查询不能使用索引，因为必须为每个author返回元素“phone408”，即使是区号408之外的author的空元素。
By use of sensitivity technique the authors give the definition of the index of power grid vulnerable region and propose an algorithm to calculate parameter sensitivity.
利用灵敏度技术定义了电网脆弱域指标，给出了计算参数灵敏度的算法。
By use of sensitivity technique the authors give the definition of the index of power grid vulnerable region and propose an algorithm to calculate parameter sensitivity.
利用灵敏度技术定义了电网脆弱域指标，给出了计算参数灵敏度的算法。
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