这容易导致 bug，变量可能会在其目标作用域之外被重用。
This is bug-prone because variables can get reused outside of the scope in which they were intended to be used.
ODR 将以 “应用程序为作用域” 把传入的 HTTP 请求路由到任何能够处理请求的目标服务器中。
The ODRs will route the incoming HTTP requests in an “application scoped” fashion to any target server capable of servicing the request.
作用域存储区的大小有最大值，这是在其创建时指定的，并且必须用于它们的目标任务。
Scoped memory areas have a maximum size that is specified when they are created and must be tuned to the task they are being used for.
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