reference variable

A static variable which holds a reference to the single created instance, if any.

如果存在静态变量的话,使用静态遍历存储创建的单件类的简单实例.

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Submit description file commands use $ ENV ( EnvironmentVariableName ) to reference the value of an environment variable.

提交描述文件命令使用$ENV ( EnvironmentVariableName )引用环境变量的值.

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Q: What is the default value of an object reference declared as an instance variable?

一个对象的缺省值是什么，当以一个实例变量作为参考时？

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Design of Attitude System Based on Model Reference Variable Structure Control for Aerocraft

飞行器模型参考变结构姿态控制系统设计

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Quantisation theory ⅳ is used to class wells by analysing the geological informations of gas wells and the seismic informations nearby the gas wells when there is no reference variable.

而数量化理论Ⅳ是在无基准变量的情况下，采用各气井的地质信息和井附近的地震信息对各井进行分型。

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Hence a variable of a class type can reference an instance of any descendant type.

因此,类类型的变量可以引用其所有子孙类型的实例.

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To facilitate this, the plug-in class implements the singleton pattern: It stores a reference to itself in a private class variable.

为了使这一点更方便，插件类实现单模式（singleton pattern）：它在私有类变量中存储一个自身的引用。

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Model reference adaptive predictor control for time-varying system with variable time delay

可变纯滞后时变系统模型参考自适应预估控制

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We also used an instance variable to store a reference to the mock object.

我们还使用了实例变量来存储对模仿对象的引用。

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Among them, the selection of reference variable is cut-tobacco broken rate, which show the cut-tobacco structure most obviously.

其中，选取的基准变量为烟丝的破碎率，它最能反映烟丝结构的变化。

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A constructor can be called using a variable of a class-reference type.

构造器可以被类引用类型的变量调用.

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They hold only one piece of data: a string, a number, the undefined value, a reference to another variable.

它只保存一段数据：一个字符串、一个数字、未定义的值以及对另一个变量的引用。

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