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=http://en.wikipedia.org/wiki/Radix_tree&usg=ALkJrhgmTZkYlWfWvzkyGsjps11FSHxKaQ was not found on this server. That’s all we know.