如何构造元素的结构是与构造组成关系数据库的列和表同样重要、复杂而且可能非常困难的设计问题。
How you construct models for elements is just as important, complex, and potentially difficult a design question as how you construct the columns and tables that comprise a relational database.
根据多项式的结构特点，利用线性链表来实现多项式相加，结点中存放各项的系数和指数，构造相应的多项式。
According to the structural characteristics of polynomial, linear linked list to achieve the polynomial are added storage nodes of the coefficient and index, constructed the corresponding polynomial.
构造了一种分析方法，然后利用光栅结构的有关表达式得到这种二维结构的近似等效系数。
An approximate equivalent coefficient for two-dimensional sub wavelength was obtained with the related expressions of grating structure.
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