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1·Remember, the supertype relation is reflexive.

记住超类型的关系是反身的。

2·The type from which a subtype inherits attributes is known as its supertype.

子类型所继承的属性来自哪个类型，该类型就被认为是这个子类型的超类型。

3·Local handles have the class Local and can also be stored in variables declared with the supertype handle.

类Local产生的本地句柄同样可以被存储在父类Handle声明的句柄里。

4·Understand how to create an entity supertype, subtypes, and associated services to allow the processing of each.

了解如何创建实体超类型、子类型和相关服务。

5·We can call this method with any kind of collection whose element type is a supertype of the element type of the array.

我们可以使用其元素类型是数组的元素类型的一个子类型的任何集合调用这个方法。

6·Entities that share some attributes, including an identifier (primary key), but not others may be modelled as having a common supertype.

一些实体具有某些共同的属性，比如标识符(主键)，而其他属性不同，这些实体可能具有共同的超类型。

7·ArrayStoreException - the runtime type of the specified array is not a supertype of the runtime type of every element in this collection.

如果指定数组的运行时类型不是集合中每个元素运行时类型的父一级类型时抛出。

8·ArrayStoreException - if the runtime type of the specified array is not a supertype of the runtime type of every element in this collection.

如果指定数组的运行时类型不是集合中每个元素运行时类型的父一级类型时抛出。

9·You might think the same is true of generic types as well — that List is a supertype of List, and that you can pass a List where a List is expected.

您也许认为这一原理同样适用于泛型类型——List是List的超类型，那么可以在需要List的地方传递List。

10·ST_Geometry, which is the supertype to all geometry types; as a function that applies to all geometry types, it is properly a method of the supertype.

作为一个应用于所有几何类型的函数，它实际上是超类型的一个方法。

超类型

1·Entities that share some attributes, including an identifier (primary key), but not others may be modelled as having a common supertype.

一些实体具有某些共同的属性，比如标识符(主键)，而其他属性不同，这些实体可能具有共同的超类型。

2·Understand how to create an entity supertype, subtypes, and associated services to allow the processing of each.

了解如何创建实体超类型、子类型和相关服务。