通常有两大类，常见格式如下：1、 ……, one of the renowned writers in …, once said that …… According to …, one of the renowned writers in …, …… According to Francis Bacon, a renowned British writer and philosopher, "Money is a good servant and a bad "2、There goes a saying that … As a saying goes, … As a proverb says, … There goes a saying that he knows most who speaks As a proverb says, he laughs best who laughs 备注：第一类最为正式，有名有姓还可说明其身份或主业所在，常见于引用当下或当代的名人；第二类适用于古代的尤其是记不住名字的名人，更常见于引用谚语、公理或俗语。