世界上任何事物都具有内外在形态上的规定性,在规定界限内,同类形态的事物组成一个集合。事物的运动发展,又具有多样性、相关性和连续性,随着人们认识的深化,集合的规定界限有时变得游移不定,某一集合与另一集合之间,存在着非此非彼,亦此亦彼的中间形态,在自然系统中,生物界的分类学,非生物界的无机化学,都能找到这种中间形态的丰富例证。 机械工程作为人工系统,也有其客观运动规律和 Everything in the world has the internal and external morphological provisions, within the provisions of the boundaries, the same form of things to form a collection. With the development of the movement of things, but also with diversity, relevance and continuity, with the deepening of people’s understanding, the boundaries of the provisions of the collection sometimes become ambiguous, between one collection and the other, there are non-bi, In the meantime, in the natural system, the taxonomy of the biological world and the inorganic chemistry of the non-living world can all find abundant examples of such intermediate forms. Mechanical Engineering as an artificial system, but also its objective law of motion and