许多文本处理命令（过滤器）可以从标准输入流或从文件中获取输入。

Many text processing commands (filters) can take input either from the standard input stream or from a file.

youdao

许多文本处理命令（过滤器）可以从标准输入流或从文件中获取输入。

Many text processing commands (filters) can take input either from the standard input stream or from a file.

youdao