力学是研究物质的机械运动和变形规律的一门科学。自然界存在着许多种运动形式,机械运动(即产生位移的运动)是最简单的一种。其它还有发热、发光、电流、化学变化等等。每一种物质运动形式都有它自己的特殊的本质和特殊的矛盾。科学研究的区分,就在于根据科学对象所具有的特殊矛盾性。因此,对于某一现象领域所特有的某一种矛盾的研究,就构成某一门科学的对象。而且,对于一个大系统的物质运动形式来说,在它发展的长途中,义有许多个过程,这些过程又有它自己的特殊矛盾和本质。我们的科学研究工作必须着 Mechanics is a science that studies the laws of material motion and deformation. There are many forms of movement in nature, mechanical movement (ie displacement of the movement) is the simplest kind. There are other fever, light, current, chemical changes and so on. Each form of matter has its own special nature and special contradictions. The distinction between scientific research lies in the special contradictions possessed by scientific objects. Therefore, the study of a particular kind of contradiction that is unique to a phenomenal phenomenon forms the subject of a science. Moreover, for a large system of forms of material movement, righteousness has many processes over its long course of development, and these processes have their own special contradictions and essences. Our scientific research must be done