Abstract
The development of metaphor theories provides foundations for the existence of metaphorical words in English for Science and Technology(EST). Metaphor and science are not in conflict. Conversely, metaphor is a way of thinking or reshaping human experience. The metaphorical use of words in EST can be divided into two categories: similarity-based metaphor and similarity- creative metaphor, which play important roles in explicating or constructing scientific theories. Index Terms - metaphor, cognition, EST I. Introduction English for Science and Technology, which is shortened as EST for convenience, belongs to a branch of ESP (English for Special Purposes). It refers to the English in the fields of agriculture, medicine, mathematics, biology, chemistry, physics, astronautics, computer science, etc. It can be divided
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