罗伯特·李·弗罗斯特（Robert Lee Frost，1874—1963）是美国著名诗人，曾四次获得普利策奖，在美国有很高的社会地位和巨大的影响力。在英语世界中有很多弗罗斯特研究者，相关研究成果十分丰富。本论文对英语世界近百年（1924—2019）的弗罗斯特研究成果做了全面系统地梳理。
论文整体上突出一个“新”字。首先是材料新。笔者注重新材料的发掘和整理，力图把英语世界最新的成果介绍到中国。本论文研究的36部传记、130篇期刊论文、88部博士论文、45部专著以及其他相关资料很多都是首次出现在中国研究者的视野之中。
其次是方法新。笔者使用自然语言分析法和基于Citespace的科学知识图谱分析法对英语世界和中国的弗罗斯特研究成果进行对比研究。这样的计算机辅助分析方法一般用于新闻、语言学等领域，在文学领域很少使用，本论文运用这两种方法，对中外弗罗斯特研究的关键词进行比较分析。
除引言和结语外，论文共分八章：
第一章对英语世界弗罗斯特的综述性和综合性研究成果做了评析。英语世界早期的研究者通常以介绍弗罗斯特诗作和对其作品进行简单评述的方式，对弗罗斯特进行研究。同时，也出现了一些文献索引性书籍和百科全书类书籍，这些书籍都能够对弗罗斯特研究提供大量资料，但是学术批评成分比较少。综合性研究成果是将零散论文集结成册，系统性不强。本章对这些成果进行了整体介绍，单篇文章根据其研究主题在本文第三、四、五、六、七章进行评析。
第二章评述了36部弗罗斯特传记。众多的传记向读者展现了丰富立体的弗罗斯特形象，同时引发争议的传记也在一定程度上保证了弗罗斯特始终成为研究者青睐的对象。笔者发现，英语世界的弗罗斯特研究注重弗罗斯特生平事迹的记录和史料的保存整理，传记数量众多，为研究者提供了丰富的第一手材料。
第三章分别从弗罗斯特诗歌的语言技巧、修辞技巧和诗学思想等角度，总结归纳英语世界的研究成果。在诗歌创作中，弗罗斯特坚持使用日常口语，语言简洁但内涵丰富，并且善于使用隐喻。英语世界学者充分注意到弗罗斯特创作的这一特征，进行了相当多的研究。
第四章对英语世界学者研究弗罗斯特诗歌主题的成果进行了总结和评价。弗罗斯特创作了大量的田园诗歌，表达对自然的热爱，他同时关注婚姻主题，在诗歌中表达对女性的同情和怜悯。作为长期生活在乡村环境下的诗人，弗罗斯特对待科学的态度是含混不清的，仿佛刻意与科学保持一定的距离。围绕这些主题英语世界产生了很多研究成果，本章对这些成果进行评析。
第五章讨论英语世界学者对弗罗斯特与其他诗人的比较研究和影响研究。笔者发现，弗罗斯特的“复杂性”是他经常被与其他诗人进行比较的原因；弗罗斯特影响了很多后辈诗人，为美国诗坛作出巨大的贡献。在这两个方面，英语世界有不少研究成果，本章对这些成果进行梳理和总结。
第六章关注英语世界学者从多元视角出发，对弗罗斯特进行的研究。英语世界研究者具有不同的学科背景，从经济学、生物学、物理学甚至音乐等不同角度，对弗罗斯特的诗歌进行跨学科分析研究。同时，有的研究者对弗罗斯特的书信、手稿、磁带和录音等进行收集、整理和研究，为其他研究者提供了珍贵的历史资料。本章对这些成果进行概括和评价。
第七章概述英语世界对弗罗斯特身份问题的研究。弗罗斯特是一位出色的教师，有独特的教育理念。同时，弗罗斯特多次公开朗读自己的诗歌，宣讲他的诗歌创作和心得体会，这些史料对于更好地理解他的诗歌艺术有很大作用。弗罗斯特并未与政治“绝缘”，他的诗歌能展现他的政治理想和对穷苦人民的同情。本章对英语世界研究弗罗斯特身份问题的成果进行评述和总结。
第八章对英语世界和中国的弗罗斯特研究进行比较。笔者发现，中国研究者在弗罗斯特诗歌的译介方面表现优异，英语世界的研究者对弗罗斯特传记的重视程度远高于中国研究者。双方研究者都喜欢将弗罗斯特与不同的诗人进行比较：但英语世界的比较很少涉及异质文化之间的比较；而中国研究者将弗罗斯特与中国文学家（中国文化）相比较，很有特色。
结语部分对英语世界弗罗斯特研究者的构成变化、研究方法和内容、研究新趋势等做了总结。从总体上看，英语世界弗罗斯特的研究者呈现多元化趋势：从早期的亲人、朋友、同事和语言文学专业的学者，扩大为多学科多领域的研究者。在研究的方法和内容方面，早期的研究者很多从诗歌文本出发，采取主观审美的方式对弗罗斯特诗歌的意象、主题、创作手法以及诗人的多重身份等方面进行分析；后来研究者结合多种文学（批评）理论，采用跨学科的研究方法，对弗罗斯特和他的诗歌艺术展开综合研究。经过统计和调查发现，英语世界的弗罗斯特研究成果进入中国学者视野的并不多，中国学者的相关成果也很少引起英语世界学者的关注。笔者认为，中国的弗罗斯特研究者应积极在国际学界发声，形成自己的研究话语，以高水平成果推动中外学术交流和对话。

Robert Lee Frost (1874—1963) is a famous American poet, a four-time Pulitzer Prize winner, with a high social status and tremendous influence in the United States. Many of Frosts scholars in the English-speaking world have generated a wealth of research results. This thesis conducts a comprehensive and systematic review of Frosts researches in the English-speaking world that spanned nearly 100 years (1924-2019).
This thesis as a whole highlights "newness". First of all, the materials are new: the author works to collect, sift through, analyze and summarize the latest research results from the English-speaking world in an effort to introduce them to China. The author takes as research objects 36 biographies, 130 periodical papers, 88 doctoral theses and 45 monographs, most of which are new to Chinese researchers.
Secondly, the research methods are new. The author adopts a natural language analysis method and a scientific knowledge map based on Citespace in conducting a comparative study of the research results in China and the English-speaking world. The computer-aided methods are usually used to study News and Linguistics and  seldom applied to literature studies. Here they are being used for the very first time to analyze the key words that occur in Frosts studies.
In addition to the Introduction and the Conclusion, there are eight chapters in this thesis:
Chapter 1 briefly introduces the researches from the English-speaking world, primarily those that are comprehensive and synthesized. Early researchers in the English-speaking world mostly introduced and briefly reviewed Frost's poetry. Meanwhile, there existed some bibliographic and encyclopedic books, which contained ample information about Frost, but with not much academic criticism. Furthermore, the research results as yet comprehensive are merely unsystematic collections of papers. This chapter gives an overall introduction to these books and papers. The reviewing and analyzing of individual articles according to their research topics take place in Chapter 3, 4, 5, 6 and 7.  
Chapter 2 classifies and summarizes 36 biographies of Frost. These biographies provide rich material for research and present a three-dimensional image of Frost, and the controversial ones make Frost a constant hot topic among researchers. The author finds that scholars of Frost in the English-speaking world focus on the recording of Frost's life stories and the preservation and organization of historical materials related to him, resulting in a large number of biographies, providing abundant first-hand materials for researchers.  
Chapter 3 summarizes the research results concerning the rhetorical skills and poetic thoughts manifested in Frosts poems. In his poetry creation, Frost insisted on using daily spoken language, which was concise but rich in connotation. He was good at using metaphor as well. Scholars in the English-speaking world have paid full attention to these features and conducted considerable studies on them.
Chapter 4 summarizes and evaluates the studies on the varied themes in Frosts poems. Frost wrote a large number of pastoral poems, expressing his love for nature. He also focused on the theme of marriage and expressed sympathy and pity for women. As a long-time resident in a rural environment, Frost's attitude towards science was ambiguous, as if he deliberately kept a certain distance from science. 
Chapter 5 discusses the comparisons of Frost with other poets and Frosts influence on them. The author finds that Frosts "complexity" is the reason why he has often been compared with other poets, and that his contribution to the poetic circle can be readily perceived by anyone studying his influence upon others. 
Chapter 6 is titled "Studying Frost from Multiple Perspectives". Some scholars in the English-speaking have conducted cross-disciplinary studies on Frosts poems in relation to their respective backgrounds, namely economy, biology, physics and even music. Others have collected, sorted through and examined Frost's letters, manuscripts, tapes and sound recordings, providing precious historical data for research.
Chapter 7 reviews the studies on Frosts identities. The author finds that besides that of a poet, Frost had identities such as teacher, speaker/declaimer and social activist. Frost is an excellent teacher with unique educational concepts. He read poems aloud to people on many occasions and talked about his creation of poetry and his reflections on it. Furthermore, Frost was not "unconcerned" with politics, and his poems expressed his political ideals and his compassion for the poor. All these data give fascinating insight into his art of poetry.
Chapter 8 compares the studies carried out by scholars from the English speaking world and those by Chinese scholars. The author finds that Chinese scholars mainly work on the translation and introduction of Frosts poems while scholars in the English-speaking world pay far more attention to his biographies. Both scholars in the English-speaking world and their Chinese counterparts enjoy comparing Frost with other poets; but they differ in that the former seldom compare Frost with poets from cultures different from their own, while the latter compare him with Chinese poets, producing distinctive results.
The conclusion summarizes the changes over time to the kinds of researchers interested in Frost, their research methods and contents, and new trends of research in the English-speaking world. Researchers of Frost are of diverse backgrounds, from his relatives, friends, colleagues as well as language and literature scholars in his own time to present-day multi-disciplinary scholars. These newly-joined scholars with their distinctly different professional backgrounds afford new possibilities for interdisciplinary research. Many of the early scholars started from the text and, through the lens of subjective aesthetics, analyzed the imagery, themes, writing methods involved in Frosts poetry, and his multiple identities. Later scholars adopted a variety of literary (criticism) theories and interdisciplinary research methods leading to comprehensive research into Frost and his art of poetry. Since the beginning of the new century, there have been two primary approaches to Frost. One is to return to the traditional textual analysis and continue to study metaphors and metrical issues. The other is to turn to culture and take Frost as a cultural symbol for cross-cultural research. The focuses on Frost are threefold. First, his poems with pastoral, natural and ecological themes remain the focal point of current research, reflecting a concern for environmental protection. Second, the theme of science in Frost's poetry conforms to the objective reality of scientific development and progress. Third, the political and economic themes in Frost's poetry are still relevant today. As to his image and identity, Frost is multifaceted and three-dimensional. A renowned poet, he was also a teacher, a speaker and a social activist.