Hi Florian,

and thanks for the patch.

pelzflorian (Florian Pelz) 写道：
> +@quotation Note
> +Naturally, no security fixes can be provided for old versions 
> of Guix
> +or its channels.  This also means that careless use of 
> @command{guix
> +time-machine} opens the door to downgrade attacks.
> +@xref{Invoking guix pull, @option{--allow-downgrades}}.
> +@end quotation

‘Attack’ is a very big word.  It should not end a paragraph.  What 
would the downgrade attack—distinct from a downgrade—look like?

Kind regards,

T G-R