Unable to access a file that is referred to by a file reference variable.
说明：无法访问是指通过一个文件引用变量到文件。
Explanation: Unable to access a file that is referred to by a file reference variable.
说明：无法访问是指通过一个文件引用变量到文件。
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。
The test variable is used to reference data throughout a test and between tests.
测试变量用于在测试之间以及测试之中引用数据。
See how I was able to reference the instance of ServletContext via the application variable?
注意我是如何通过application变量引用ServletContext的实例的。
Note the "! "before the variable name to signify the quiet reference notation.
注意变量名前面的“！”
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。
If these exist, you should pass a reference to an existing variable.
如果这些引数存在的话，您必须将参考传递至现有变数。
How to reference a variable without knowing the specific type?
如何引用变量而不知道具体的类型？
The association of a variable with an object is called a reference.
一个变量和一个对象的关系叫做引用。
Use the standard variable declaration syntax to declare a reference.
请使用标准的变数宣告语法来宣告参考。
The compiler resolves the reference to the base class version of the variable.
编译器会将参考解析为变数的基底类别版本。
You just can reference a variable and this variable may momentarily contain an object.
你只是可以引用一个变量并且这些变量可以瞬间包括这个对象。
You just can reference a variable and this variable may momentarily contain an object.
你只是可以引用一个变量并且这些变量可以瞬间包括这个对象。
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