要延长其显示，在它和下一个命令之前置入一个sleep命令。
To prolong its display, place a sleep command between it and the next command.
使用交互式可视化建模避免用户编写前置处理器宏命令文本，缩短了SHEET - FORMING前处理器的建模时间并降低了建模难度。
Using interactive visual modeling module can avoid user editing Pre-processor macro command text, and shorten modeling time with SHEET-FORMING Pre-processor, and reduce modeling difficulty.
这个方法是在前置处理讯息时呼叫以处理命令按键。
This method is called during message preprocessing to handle command keys.
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