When the output of cat is not redirected to a file or another command's standard input, cat behaves as most command-line tools and send its output to the console.
当cat的输出没有被重定向到一个文件或另一个命令的标准输出时，cat表现出来的行为与多数命令行工具一样，即将其输出发送到控制台。
A console application is run from the command line with input and output information being exchanged between the command prompt and the running application.
控制台应用程序通常从命令行运行，同时在命令提示和运行的应用程序之间交换输入和输出信息。
A console application is run from the command line with input and output information being exchanged between the command prompt and the running application.
控制台应用程序通常从命令行运行，同时在命令提示和运行的应用程序之间交换输入和输出信息。
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