阐述了牛顿定律、引力定律和库仑定律建立的依据，以及若干重要物理量引入的依据，最后讨论了如何恰当评价对 称性和守恒律在基础物理教学中的地位.本文旨在表达一种教学理念，即，对物理学所蕴含的丰富物理思想和特有思维方式的 明确阐述或深刻诠释，乃是一门物理学课程学术水平的重要体现，而努力提高物理学课程的学术水平，应当成为提高大学物 理教学质量的一个重要方面.

This paper expounds the basis of the Newton's laws and the universal gravitation law as well as the Coulomb's law established，the basis of several important physical quantities introduced，finally discusses how to properly evaluate the symmetry and the conservation law in the college physics teaching. The purpose of this paper is to express a kind of teaching ideas，namely，to clearly expound or profound interpret for the rich physical thoughts and the special way of thinking in physics，is an important embody of the academic level of a physics course，so the efforts to enhance the academic level of physics courses should become an important aspect of improving the quality of the college physics teaching.