引用:

The requested URL could not be retrieved

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While trying to retrieve the URL: http://encrypted.google.com.hk/url?

The following error was encountered:

Unable to determine IP address from host name for encrypted.google.com.hk
The dnsserver returned:

Name Error: The domain name does not exist.
This means that:

The cache was not able to resolve the hostname presented in the URL.
Check if the address is correct.
Your cache administrator is root.