本文针对工科类专业本科专业课教学中的若干共性问题，结合钱学森现代科学技术体系观，倡导在专业课教学中注重共性与具体、科学与常识、定性与定量“三结合”，即科学共性基础与具体问题相结合、科学原理与生产生活经验常识相结合、定性与定量相结合的基本理念。以土木工程本科专业课《荷载与结构设计原则》的课程教学为例进行了初步阐述。

For some issues of common interest in the teaching of specialty courses for undergraduate students majored in engineering, in the present paper the perspective of Tsien’s modern scientific and technological systems is adopted, and the viewpoint of “three-incorporation” in teaching, i.e., the incorporation of scientific common basis and special engineering problems, the incorporation of scientific principles and experiences or commonsense in daily life and industrial production, and the incorporation of qualitative concepts and quantitative methodologies, is proposed. The idea is illustrated by taking the teaching of undergraduate course “Loads and Structural Design Principles” as an example.