Weak and soft references both extend the abstract reference class (as do phantom references, which will be discussed in a future article).

弱引用和软引用都扩展了抽象的reference类(虚引用(phantom references)也一样，这将在以后的文章中介绍)。

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Clear: Setting the reference object's referent field to null and declaring the object in the heap that the reference class referred to as finalizable.

清除：将引用对象的 referent 域设置为 null ，并将引用类在堆中引用的对象声明为 可结束的。

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However, when it occurs within the declaration portion of a managed reference class type, it is treated as a keyword within the context of that class declaration.

但是，当它出现在托管引用类类型的声明部分中时，将其视为该类声明的上下文中的关键字。

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The company is growing faster than its competition due to a best in class reference customer list and more recently, the launch of software that is easier to use, focuses on alerting users when something is wrong, and finally, a push into the mid-market with an in-house sales force.

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Mr. Ehrmann said he has since added a reference document, which he can email to students after the class.

WSJ: Taking Cocktail-Making Classes