404. That’s an error.

The requested URL /translate_c?act=url&depth=1&hl=zh-CN&ie=UTF8&prev=_t&rurl=translate.google.com&sl=en&sp=nmt4&tl=sl&u=https://en.wikipedia.org/wiki/Functional_group&usg=ALkJrhi_gaOoe_cR-V0ukBXS5hHiOwgfEQ was not found on this server. That’s all we know.