404. That’s an error.

The requested URL /translate_c?depth=1&hl=en&ie=UTF8&prev=_t&rurl=translate.google.com&sl=auto&tl=ar&u=http://onlinelibrary.wiley.com/resolve/reference/XREF%3Fid%3D10.1016/0006-8993%2888%2991142-0&usg=ALkJrhi0IqhrI2RqkrnbUVJYiKxGEkO6yQ was not found on this server. That’s all we know.