Hybrid element is the element that the stress is balanced inside the element and the border displacements is compatible between adjacent elements.
杂交元是假定单元内部平衡的应力和相邻单元间协调的边界位移。
Instead of grouping based on a beginning element, it is sometimes necessary to group items that are adjacent to each other.
分组不是基于起始元素，相反，有时需要对彼此相邻的项进行分组。
With each story of frames as a basic element, the transfer relation of the end state vectors of an adjacent basic element is established.
文章取框架的每一层作为一个单元，建立基本单元端部的状态变量到相邻单元端部状态变量之间的转换关系。
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