正如前面所述，这些构件并不处理系统和外部系统间的交换序列。
These artifacts, as stated earlier, do not address the sequence of the interactions between the system and the external entities.
网络控制的概念被扩展到了让数字交换机与数据库（称为服务控制点）和信号处理系统（智能外设）通信。
The concept of network control was extended to let digital switches communicate with databases (known as Service Control Points) and signal processing systems (Intelligent Peripherals).
接收系统是一个信息处理系统，它能从另一个系统为数据交换而生成的卷上读出一组文件。
Receiving system is an information processing system which can read a set of files from a volume which has been created by another system for the purpose of data interchange.
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