compound structure短语¹⁴⁴⁹⁷²⁺² 基本例句 复合结构 The results show that the fatigue life becomes longer with the increase of whole strength of compound structure and the increase of overlay depth of steel fiber concrete. 结果表明：复合试件整体强度越高，上层钢纤维混凝土加铺层厚度越大，其疲劳寿命越长。 cnki