Here, whatever the user types until a Control-D (end of file indicator) becomes the command's input.
这里，用户输入Control - d(文件结束指示符)前输入的所有内容都成为command的输入。
2
enables control of Exaile via the sound menu indicator. It supports all of the functions you’d expect: forward, backwards, pause/play, track info and cover art.
Each block of output code within a repeated sequence has its own internal position indicator, and any control within such a block can access that indicator through the index XPath extension.