您可以从 GCC 得到提示：为每个应用程序维护多个环境变量集，并根据手头的工作从一个集合切换到另一个集合。
You can take a cue from GCC: maintain many sets of environment variables per application and switch from one pool to another depending on the work at-hand.
在传统的非brms IT环境中，业务规则位于IT部门管理和维护的各种IT系统应用程序中。
In a traditional non-BRMS it environment business rules are housed in various it systems applications that are managed and maintained by it departments.
计划、实现和维护应用程序开发和测试环境的困难是非常显而易见的。
The challenges to planning, implementing, and maintaining an application development and test environment are evident.
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