Leaf area index and surface soil moisture are two basic factors of controlling evaporation.
叶面积指数和表层土壤含水量是控制蒸发的两个基本因素。
The fracture energy GF of concrete is one basic material characteristic, representing the energy necessary to create a unit area of fracture surface.
混凝土断裂能G _ F是材料的一个基本性能，表示扩展单位裂缝面所需要的能量。
On the basis, the author raises the suitable basic level structure forms and types of highway road surface in the area.
在此基础上，提出了适合该地区的公路路面基层结构形式和基层类型。
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