Each object name has its alias to display, which is called Business name.

每个对象名称都要显示其别名，该别名叫做商业名称。

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There can be no side effects on immutable objects, and caching a reference to an immutable object is always safe from alias problems.

不可变对象上没有副作用，并且缓存不可变对象的引用总是安全的，不会出现别名问题。

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Figure 19 shows creating an alias (as a result of clicking New), which is the orderNumber attribute of the order business object.

图19显示了创建的别名(单击new得到的结果)，它是order业务对象的ordernumber属性。

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