The computer refers to this point as the return address and keeps track of it in the stack frame.
计算机引用这一点作为返回地址，会在堆栈框架中跟踪它。
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From a more technical point of view, SCA defines the frame around business components (via a common interface definition) and enables them to communicate with each other over corporate boundaries.
For communication between a WLAN station and an access point, frame acknowledgments decrease the bandwidth, as do the number of other stations using the same access point.