With the internal program environment subroutines in place, we can specify a simple keyword matching subroutine
准备好内部程序环境子例程之后，就可以指定一个简单的关键字匹配子例程
An application's message loop is an internal program loop that retrieves messages from a thread's message queue, translates them, and then sends them to the application to be handled.
应用程序的消息循环是内部程序循环，它从线程的消息队列检索消息，然后转换这些消息，之后将它们发送给要处理的应用程序。
Before the operation of the motor, the system detects the external protective circuit, PLC and its internal program.
在电动机运行前，该保护系统对外部保护线路、PLC内部程序及PLC自身进行检查。
Before the operation of the motor, the system detects the external protective circuit, PLC and its internal program.
在电动机运行前，该保护系统对外部保护线路、PLC内部程序及PLC自身进行检查。
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