404. That’s an error.

The requested URL /translate_c?depth=1&hl=zh-CN&rurl=translate.google.com.hk&tl=zh-CN&u=http://en.wikipedia.org/wiki/Inner_product&usg=ALkJrhi2ZJRjirqiMAmSFJq_PKtrcmRnhA was not found on this server. That’s all we know.