The paper clarifies the hierarchy between "basic law" and "other laws" first and then deals with the protection of the interests of vulnerable groups in the railway traffic accidents as well as considering corporate social responsibility.

Under the frame of sustainable development,this paper proposes the supporting conditions and laws to which sustaining water resources utilization should follow,including some supporting conditions and laws of nature,socioeconomy and physical environments.

According to the Dissipative Structure Theory and the Ecosystem Need Laws,this paper analyzes theoretically the six basic laws of the interactive .

Three arts of consistency problems are clarified based on the renewed basic laws for polar continua.

The theoretical and applied research results for mesomechanics, theories of strain gradient, polar continuum mechanics, nonlocal continuum mechanics and basic laws are discussed one by one in the present paper.

We can get better effect to let our professional students understand the basic concepts and the basic laws,and master the basic analyzing methods of text if we teach them from the three aspects mentioned above.

The theoretical system consists of 5 basic laws and 8 constitutive principles and it erects a bridge across the gap between the pure theory of mechanics and engineering practice.