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。
2
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。
3
The argument defines the level of the call stack for which you want to obtain the return address.