垫层的宽度应大于模板的外形尺寸，以保证支模施工的需要。
The widths of the layer shall be greater than the formworks to be used.
根据分枝结构的外形特征，把分叉结构归纳为三种模板模型。
Three types of model templet, which are created depending on characteristic of branching structure, are used as the module of L-systems.
模板一经选中，分区和外形固定，但建筑的最大尺寸可以更改。建筑呈“棱镜”状（这是个什么状？是不是只有框架？）
Once a template is selected, zoning and shape are fixed but the overall dimension of the building can be changed.
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