There are two kinds of “users” of a type: derived types and code that works with instances of the type.

类型有两种“用户”： 继承类型，以及使用类型实例的代码。

youdao

So, we use a Factory class (a.k.a. an object factory) to provide the client code with instances of Db2AttendeeDAO and DefaultDAO as needed.

因此我们使用 Factory 类（又名对象工厂），以根据需要为客户机代码提供 Db2AttendeeDAO 和 DefaultDAO 实例。

youdao

Populating the free pool with instances improves initial response time, because initial requests for the bean can be satisfied without generating a new instance.

用实例来填充空闲池可以提高初始响应时间，因为对该bean的初始请求不用生成新的实例即可得到满足。

youdao

There are many other instances of this myth-making imagination that Yeats is always working with.

还有很多这样叶芝用想象力,进行神话创作的的例子。

耶鲁公开课 - 现代诗歌课程节选

They are instances of a class, and associated with that class is a set of methods.

它们是同一个类的实例，与这个类相关联的是一个方法集,因此例如，我可以说。

麻省理工公开课 - 计算机科学及编程导论课程节选

This in combination with the effects of aging and with genetic disposition in some instances, can cause a worldwide pandemic, and this is what we're currently experiencing.

某些场合中,衰退和生化影响,能引发全球性的大流行，这也是我们近来所见所闻。

斯坦福公开课 - 7个颠覆你思想的演讲课程节选

Already, Asia is dotted with instances of Web censorship or threats of same.

FORBES: Side Lines

History is replete with instances in which warning signs were ignored and change resisted until an external, "improbable" event forced resistant bureaucracies to take action.

CENTERFORSECURITYPOLICY: Straw in the solar wind

The Virtual Forum of Water Observatory will continue the discussion with instances of reviews, comments and other contributions for a period of 20 days, starting on 16 October.

UNESCO: Programa Hidrol��gico Internacional: Workshop - Online Forum: "Water and Habitat"