The rest of this section takes you through the access path graph one more time from the data flow perspective so that you can gain a full understanding of the performance aspect of query execution.

本节的其余部分再一次以数据流的观点向您介绍访问路径图以便您可以在查询执行的性能方面获得充分的理解。

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The same goes for ads, email, YouTube, and our other services: Understanding people and the social graph can make all of them better.

同样的情况也适用于广告、电子邮件、YouTube和我们的其他服务：理解人与社交图，就能让他们所有人都更上层楼。

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Next, because understanding the changes is such a key part of CTA, we introduce a new graph in Figure 4 that shows the impact of changes in each build and how well those changes were tested.

接下来，因为知道变更是CTA的重要部分，所以我们引入一个图4中的新图表，显示出每次构建中变更的影响，以及那些变更测试得有多好。

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Kurzweil says he plans to lean heavily on the Knowledge Graph to help improve natural language understanding as well.

FORBES: This Is How Google (And Its Advertisers) Will Really Get Inside Your Head

Those four technical challenges are: the knowledge graph, speech recognition, natural language understanding and (understanding) conversation, he said.

FORBES: Google's 4 Biggest Technical Challenges, According To Search Guru Amit Singhal - SXSW