Type screen without any arguments in any window to open a new window.
在任何窗口中输入 screen,不带任何参数,就会打开一个新窗口。
Each event function contains two forms: one without any arguments, and one that contains a function as an argument.
每个事件函数都包含两种形式:一个没有任何参数,一个包含一个函数作为参数。
It can be run in one of two ways, either with a single command line argument, which should be an errno value, or without any arguments.
它能以两种方式之一运行,带单个命令行参数,该参数应该是errno值,或不带任何参数。
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