英语翻译于是他向身边的行人询问.而这个行人也不知道,王先生便道了谢去问那边的警察.警察告诉了他.

Then he enquired a passer-by,yet the latter did not know neither.Mr.Wang thanked him/her(任选,缺上下文,故不知道是男是女) and went to ask the policeman over there and,this police man told him information he needed.