但中间件堆栈中使用的各个组件可能会造成一些限制，而在运行生产环境中的SOA应用程序和遗留应用程序时需要中间件堆栈。
But the limiting factors can be attributed to the various components used in the middleware stack, which is required to run SOA applications and the legacy applications that run in production.
通常，操作系统和任何中间件堆栈都经过了自定义，对最终用户隐藏。
Typically, the operating system and any middleware stack are customized and hidden from the end user.
SOA 应用程序在重型中间件堆栈或平台上运行。
SOA applications run on a heavy middleware stack or a platform.
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