名人名言的英文表达辨析

Famous quote是从说名言的人的角度来讲的，
famous quotation是从引用该名言的人的角度来讲的

例句：
In "How Science Brings Benefits to Humanity,"Einstein said a famous quote. 爱因斯坦在《要使科学造福于人类》中说过一句名言。
That piece from the book is a quote from the famous play of Guan Hanqing, named "Dou E's Injustice". 文中的那段话引自关汉卿的名剧《窦娥冤》。
With the above quotation, Alfred Marshall opens his famous "Principles of Economics" . 阿弗里德·马歇尔用上面所引的话开始了他的名著《经济学原理》。
The quotation comes from his“ Reply to Ren Shaoqing's Letter”.
此处引语见他的《报任少卿书》。

一个是quote,一个是quotation

一个单 一个复