This is the normal mechanism whereby stack size adjusts to demand. However, if the maximum stack size has been reached, we have a stack overflow and the program receives a Segmentation Fault.
当然，这是根据实际需要来调整栈大小的一般机制，如果栈的容量达到了最大值上限，那么栈就会溢出，程序也会收到一个段出错的信息。
This mechanism is used to resolve resource-name conflicts: if two library JAR files define a resource with the same global name, the local names will be used based on the stack-frame of the caller.
用来解析资源名称冲突的机制是：如果两个库jar文件都用相同的全局名称定义一个资源，那么则根据调用程序的堆栈帧来采用局部名称。
The lowest channel in this stack always does the same job: It maps the message being sent to whatever mechanism is used to transport that message.
在堆栈中最底层的通道所做的工作是相同的，即负责将要传递的消息与用来传输该消息的相关机制映射起来。
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