首先是科学家和技术人员开发的机器、产品和应用知识体系的应用。
The first of these is the application of the machines, products and systems of applied knowledge that scientists and technologists develop.
科学不仅仅是一种自然知识体系或满足人类生存需要的工具，而且还代表了一种崭新的精神、一种独特的文化，即科学文化。
Science is not only the kind of knowledge system of nature and the instrument of human being, but also stands for the kind of new spirit and the unique culture, that is science culture.
课程的知识体系主要依据中学科学课程师资的培养需要而定，同时也需考虑其他教学因素。
The knowledge system of the course is mainly decided according to the need for middle school science education teachers' training.
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