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科技英语次技术词的词义特征及搭配特点
随着语言学与科学技术的日益发展，科技英语越来越多地吸引研究者的关注。次技术词作为科技英语中特殊的语言现象，相比通用英语与其他文体，具有其自身特点，因而也成为了科技英语学习及教学中的难点。本文主要着眼于科技英语次技术词的词义特征及搭配特点展开研究。
Chapter 1 Introduction
1.1   Research Background
    Linguistically, word is the "minimal free form" (Leonard Bloomfield, 1926) that can be used in isolation with semantic or pragmatic content. As an essential part of language, it is crucial for language learners to understand their meanings. What's more, they should know how to use a particular word in a specific context. Words take on different features or functions in different registers or fields. Moreover, a word may have multi-facet performances when used in various cotexts. That means despite the helpfulness of learning more words, people should know how to use a right word in a right place.
Nowadays, with the linguistic enrichment from science and technology, English for Science and Technology (henceforce EST) has summoned many researchers"academic efforts. Given its great benefit for the EST learning and teaching, thesemi-technical words in EST, as one of the indicators of the EST genre, is becomingmore and more worthwhile for the linguistic investigation. Therefore, the study ofsemi-technical words in EST is not only a lexicon-specific, but a genre-specific atlarge, and even more generally, a multi一field research.
    However, the previous researches on the semi-technical words were mainly concerned with their identification and definition. Though several studies employed relative corpora, which were based on modern computer technology to process tens of thousands of natural words at a time, undertaking the quantitative taskr most of them just engage themselves with the words" frequency ranks and little work has been done about the in-depth investigation on semi-technical words' semantic meaning, collocational pattern and their pedagogical implication.
1.2 Significance of the Study

References
Andreas Schuderer. (2002). Corpus Linguistics. Ubunq Schools of Linguistics.
Ary, D., Jacobs, L.C. and Razavieh, A.(1985): Introdzrction to Research in Education (3d Ed.). New York; Holt, Rhineheart and Wiriston.
Baker, M.(1988). Sub-technical Vocabulary and the ESP Teacher: An Analysis of
Some Rhetorical Items in Medical Journal Articles.
Barber, C. L. (1962). https://www.51lunwen.org/languagethesis/

Some Measurable Characteristics of Modern Scientific Prose. In F. Behre (Ed.), Gothenburg Studies in English: vol. 1;t. Contribulion.s to English Syntax and Philology (pp.21-43). Gothenburg: University of Gothenburg.
Biber, D., Conrad, S.,&Randi, R. (1998). Corpus Linguistics. London: Cambridge University Press.

Acknowledgements 5-6
Abstract 6
内容摘要 7-8
Contents 8-10
Chapter 1 Introduction 10-13
    1.1 Research Background 10
    1.2 Significance of the Study 10-12
    1.3 Organization of this Paper 12-13
Chapter 2 Literature Review 13-22
    2.1 Corpus and Corpus Linguistics 13-15
    2.2 The Definition of Semi-technical Words 15-19
        2.2.1 Definition of Semi-technical Words in Broad Sense 15-17
        2.2.2 Definition of Semi-technical Words in Narrow Sense 17-19
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