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

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。

youdao

First, on input it reads the entire XML file into memory, so if the file is too big, or if you're dealing with a stream of XML data, you can't use the module.

首先，在输入方面，它将完整的XML文件读入内存，所以如果文件非常大或者需要处理XML数据流，就不能使用这个模块。

youdao

It's a text editor, but unlike file editors such as Ed, it edits the input stream and writes to the output stream.

它是一个文本编辑器，但是与诸如ed等文本编辑器不同，它编辑输入流并写到输出流。

youdao