traffic loads短语¹⁴⁴⁹⁷²⁺² 基本例句 交通荷载 Research in the area of bridge design has been and still is concentrated on the study of the strength of materials and relatively few studies have been performed on traffic loads and their effects. 目前在桥涵设计的科研领域中，对材料和结构体系的研究占主导地位，而对于车辆荷载和以及车辆荷载效应的研究却相当少。 cnki