可以扩展任何功能,从增加命令别名直至创建全新的命令集。
Extending the functionality can include anything, from adding a single alias to a command, to creating a completely new set of commands.
这表示它完成的不仅仅是个文件名 -- 事实上是任何事,从命令到别名到环境变量都可以。
This means it can complete more than just filenames - anything at all in fact, from commands to aliases to environment variables.
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