What is the difference between a reference and a regular variable ? how do you pass by reference & why would you want to 引用变量与普通变量之间有何区别？如何通过引用传值？在什么情况下会这样做？
You can use either of these operators to determine if two reference variables refer to the same object instance 比较两个对象引用变量。使用其中任一运算符均可确定两个引用变量是否引用相同的对象实例。
Are constant expressions that can reference variables and functions . these include user - defined type variables and user - defined functions 为常量表达式，可以引用变量和函数，其中包括用户定义类型变量和用户定义函数。
Has a name the word that you use to refer to the value the variable contains and a data type which determines the kind of data that the variable can store “变量”具有名称（用来引用变量所含值的词）和数据类型（它确定变量可存储数据的类型） 。
Because implicit objects are declared automatically , we need only use the reference variable associated with a given object to begin calling methods on it 因为隐式对象是自动声明的，所以我们只需要使用与一个给定对象相关的引用变量来调用其方法。
The modified algorithm can work well in the presence of gaussian noise , which conquers the disadvantage of using ica only considering noise - free condition before 修正fastica算法通过在对比函数中引用变量的高斯矩而对高斯噪声做以一定的处理,克服了以前引用ica时均不考虑环境噪声的弊端。
However , these assertions are limited to primitive operations , such as " assert equal on two variables " and " assert not null on a reference variable . " the primitive junit assertions are useful , but they don t represent the many complex assertion abilities you need in real - world software unit - testing scenarios 然而，这些断言仅局限于基本操作，例如“断言两个变量相等”和“断言引用变量非null ” 。基本的junit断言是有用的，但是它们无法给出在现实的软件单元测试场景中所需要的众多复杂的断言能力。
