记叙文往往一开头就提供有关背景环境的消息，清楚地交代文中所述的动作发生在何时、何地和与何人有关。
When, where and to whom the action in a narrative happened is often made clear at the beginning of the narrative.
第一章首先交代了模糊语言学的历史背景及其相关基本概念—模糊集合与模糊限制词。
The first chapter gives, above all, an account of the historical background of fuzzy linguistics and two basic concepts-fuzzy set and hedges with respect to it.
文章认为，时见报端的模糊词用于交代新闻背景或概括新闻情节时，具有诸多得天独厚的作用。
It adopts the view that the fuzzy terms, commonly seen in the press, play unique roles in backgrounding and highlighting news events.
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