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作文范围随着科技的进步,历史的发展,人类越来越需要科学地认识、能动地改造自然和社会。“说明”这种表达方式也越来越广泛地为人们所重视。本单元中的范文《一次大型的泥石流》就是以1977年云南蒋家沟的一次泥石流为例,说明这种自然灾害形成的原因、发生、发展、结束的全过程,它所造成的危害等等。《眼睛与仿生学》不仅对各类结构独特的眼睛作了分析,还进一步引申到仿生学这门边缘科学的形成和发展。《现代自然科学中的基础科
With the advancement of science and technology and the development of history, mankind increasingly needs scientific understanding and dynamic transformation of nature and society. The “description” expression has also become more and more widely appreciated by people. In this unit, the “Large Debris Flow” is a case of a mudslide in Jiangjiagou of Yunnan Province in 1977 to illustrate the causes, occurrences, developments, and completions of this natural disaster, the damages it caused, etc. . “Eye and Bionics” not only analyzes all kinds of unique eyes, but also extends to the formation and development of bionics. "Basic Science in Modern Natural Science