The studies of the Great Preface in U. S can be classified into three modes, firstly, applying Abrams' theory to the Great Preface;

美国汉学界《诗大序》研究可分为三种代表性类型：一是刘若愚与吉布斯运用阿布拉姆斯艺术＂四要素＂理论剖析《诗大序》；

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The accident was the preface to a great scientific discovery.

这一偶然事务成了一项重大科学发明的前奏。

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As a former employee of Goldman Sachs, I must preface this blog post by saying that I had a great experience at the firm and do believe that the CEO, Lloyd Blankfein, is doing everything he can to handle the situation.

FORBES: Goldman Sachs Faces-Off with Shareholders