接下来，了解如何使用Eclipse ADT自动创建私有、公共密钥，以及签署和优化应用程序。
Next, look at how to use the Eclipse ADT to automatically create the private and public keys and to sign and optimize the application for you.
这主要集中在简化应用程序的开发、自动化和优化方面。
These have focused on simplifying the development, automation, and optimization of applications.
Hadoop可以自动地改进性能，同时向用户提供接口，让他们可以针对自己的应用程序优化性能。
Hadoop can work to automatically improve performance, while leaving the interface for users to tune performance according to their specific applications.
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