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.
你在寻找多重性为1的关联结尾，记为1in UML2 (请见下面的图8)。
You are looking for association ends which have a multiplicity of one, symbolized by 1in UML2 (see Figure 8 following).
具体到本例，考虑所有关联结尾的外键的建立都带有多重性“1”。
For this example, consider the creation of a foreign key for every association end to occur with a multiplicity of "one". As a consequence, two things may occur.
计量资料的关联性用多重线性回归分析。
Multiple linear regression analysis was used to measure the relevance of the information.
计量资料的关联性用多重线性回归分析。
Multiple linear regression analysis was used to measure the relevance of the information.
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