The purpose behind each software stack is the application level: the applications are the real value in the software stack.
每个软件堆栈的最终目的都与应用程序有关：应用程序是软件堆栈的真正价值所在。
With this technique, you are effectively starting the transaction at a lower level in the call stack, thereby reducing the amount of time you are in the database.
通过此技巧，您可以有效地在调用栈的较低层次开始事务，从而减少花费在数据库中的时间。
The argument defines the level of the call stack for which you want to obtain the return address.
这个参数定义希望获取返回地址的调用堆栈级别。
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