404. That’s an error.

The requested URL /translate_c?depth=1&pto=aue&rurl=translate.google.ru&sl=en&sp=nmt4&tl=ru&u=https://developer.apple.com/library/ios/documentation/General/Conceptual/DevPedia-CocoaCore/Protocol.html&usg=ALkJrhiljDvbZsiJZ7sOb_c5uugAv51l8g was not found on this server. That’s all we know.