An entity set is not a data modeling construct; it does not describe the structure of data.
实体集不是一种数据建模构造，它没有描述数据结构。
Specify the entity set and the merge option so that query results can be tracked as entities.
指定实体集和合并选项，以便能够将查询结果作为实体进行跟踪。
The properties that make up an entity key should be chosen to guarantee uniqueness of instances in an entity set.
在选择构成实体键的属性时应确保实例在实体集中的唯一性。
The values of entity key properties must uniquely identify an entity type instance within an entity set at run time.
实体键属性的值必须在运行时唯一标识实体集中的实体类型实例。
An entity set is defined within an entity container, which is a logical grouping of entity sets and association sets.
实体集在实体容器中定义，后者是实体集和关联集的逻辑分组。
That is, for any two entities within an entity set, the values for all of the properties that constitute a key cannot be the same.
也就是说，对于实体集中的任意两个实体，构成一个键的所有属性的值不能全部相同。
That is, for any two entities within an entity set, the values for all of the properties that constitute a key cannot be the same.
也就是说，对于实体集中的任意两个实体，构成一个键的所有属性的值不能全部相同。
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