但他仍然相信这个体系只需要升级，而无需替换。
But he also believes that the system needs only upgrading, not replacing.
此功能使应用程序能够在运行时轻松地用新版本替换旧版本，而无需让服务器离线。
This makes it easy to get an application running and replace old versions with new versions without taking the server offline.
新的派生类应该能够替换基础类而无需修改代码。
The new derived classes should be able to replace the base classes without any change in the code.
学习了如何替换现有目标和添加新的目标，而无需重新部署初始LoanProcess应用程序。
You learn how to replace an existing destination and add a new destination without needing to redeploy the original LoanProcess application.
MapReduce簇可以通过替换函数子和提供新的数据源来重新使用，而无需每次都对整个应用进行编译，测试和部署。
MapReduce clusters are reused by replacing the functors and providing new data sources without having to build, test, and deploy a complete application every time.
MapReduce簇可以通过替换函数子和提供新的数据源来重新使用，而无需每次都对整个应用进行编译，测试和部署。
MapReduce clusters are reused by replacing the functors and providing new data sources without having to build, test, and deploy a complete application every time.
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