但是，关联的多重性经常不是任意的，而依赖于属性值，这不能用图形建模语言，例如UM l类模型来表示。
However, the multiplicity of associations often is not arbitrary, but depends on attribute values, which cannot be expressed with graphical modeling languages such as UML class models.
在UML 中，关联与模型中的两个或多个类有关，关联由带数字的单箭头表示，数字意味着该关联的多重性。
In UML, an association relates two or more classes in a model and is indicated by an arrow on one end along with a number implying the multiplicity of that association.
因为类的多重继承有危险性。
由于民事关系的复杂性、民事违法行为性质的多重性，因而在实践中不可避免地会经常出现这两类责任发生竞合的现象。
As the complexity of civil relations, the nature of the multiplicity of civil offenses, which in practice will inevitably occur two types of responsibility are often competing phenomena.
主要研究一类三阶两点边值问题变号解的存在性和多重性，利用不动点指数和拓扑度理论等得到了新的结论。
We show existence results for multiple sign-changing solution for third-order two- point boundary value problems by using the fixed point index and the topologic degree theory.
讨论了带非负扰动并具有第二类边值的临界非齐次多重调和方程的多解存在性和非存在性。
This paper deals with the existence and nonexistence of solutions for a critical semilinear polyharmonic equation with the second boundary and with a non-negative perturbation.
通过极小化作用原理和极小极大方法得到了一类四阶非线性椭圆方程解的存在性和多重性。
The existence and multiplicity results are obtained for a class of fourth-order nonlinear elliptic equations by the least action principle and the minimax methods, respectively.
通过极小化作用原理和极小极大方法得到了一类四阶非线性椭圆方程解的存在性和多重性。
The existence and multiplicity results are obtained for a class of fourth-order nonlinear elliptic equations by the least action principle and the minimax methods, respectively.
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