There is no special function or syntax for calling an external command. Taking advantage of the Regina utility rxqueue, which puts output onto the Rexx stack, we can write a "numbered ls" utility as
没有特定的函数或语法用于调用外部命令。
Functions, external routines, and the stack.
函数、外部例程和堆栈。
Multiple devices can be connected in series through an interface that sends data up and down the battery stack without external level shifters or isolators.
多个器件可以通过一个接口串联连接，该接口无需外部电平移位器或隔离器，就可沿着电池组来回发送数据。
The modem requires a block of external memory for the protocol stack, layer 1 and physical layer code.
猫的协议栈、第一层和物理层代码需要使用一外部存储器区。
The modem requires a block of external memory for the protocol stack, layer 1 and physical layer code.
猫的协议栈、第一层和物理层代码需要使用一外部存储器区。
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