根据当代语言学的观点,人们在不同的社会活动领域内进行交际时,由于不同的交际环境,就各自形成了一系列运用语言材料的特点,这就是语体[1]。根据不同的言语环境,语体首先分为日常谈话语体和公众书卷语体两大类。科学语体是书卷语体的一种,科学语体的功能是准确而系统地叙述自然 According to the perspective of contemporary linguistics, when people communicate in different fields of social activities, they form a series of characteristics of using language materials due to different communication environments. This is the style of language [1]. According to different speech environments, the genre is divided into two major categories: the daily discourse style and the public discourse style. The style of science is one kind of scroll style, the function of science style is to describe the nature accurately and systematically