注意，命令名以小写字母开头。
Notice that the name of the command begins with a lowercase character.
youdao
当然，按字母顺序排列的命令列表对您也许没什么帮助。
Of course, an alphabetical list of commands may not be all that helpful.
用户可以通过键入该字母来选择菜单命令。
The user can select the menu command by typing that letter.
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