Each entity must have a unique entity key within an entity set.
实体集内的每个实体必须要有一个唯一的实体索引键。
The entity key for the instance is unique within the entity set.
实例的实体键在该实体集中是唯一的。
The properties that make up an entity key are chosen at design time.
构成实体键的属性是在设计时选择的。
The properties that make up an entity key for a given entity type cannot change.
构成给定实体类型的实体键的属性不可更改。
However, some (but not all) of the values that make up an entity key can be the same.
但是，构成实体键的部分(而不是全部)值可以相同。
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。
This provides the ability to save the same entity with the same key value in more than one registry.
这提供了将具有相同键值的相同的实体保存到多个注册中心的功能。
An entity represents a grouping of attributes around a single, key, unifying information concept, for example, person, product, order or payment.
一个实体表示围绕一个单独的、关键的、统一的信息概念进行属性分组，例如人、产品、订单或支付。
Each entity in the logical data model is assigned a primary key.
逻辑数据模型中的每个实体都被指定了一个主键。
The typical method is to look up the entity by its primary key, because that will guarantee a unique result.
典型的方法是根据实体的主关键字进行查询，因为这可以保证产生一个独一无二的结果。
An entity's primary key is the attribute or set of attributes that distinguish one instance of the entity from another.
实体的主键是使该实体的一个实例区别于其他实例的一个或一组属性。
However, in many cases, an entity of importance is a subset of a record, or spans several tables and requires data to be joined through a common key.
但是，在很多情况下，重要的实体是一个记录的一个子集，或者跨多个表，需要通过公共键链接数据。
Multiple attributes in the entity may be combined to form a composite primary key.
实体中的多个属性可以组合成一个复合的主键。
Thus the knowledge of this secret key provides identification of the entity.
这样，通过这个秘密密匙就可以对实体进行身份验证。
The private key remains under the protection of the entity to which it belongs.
私有密钥一直处于其所属实体的保护之下。
We also use a primary key class, constructed from the values comprising the EJB primary key, to make it easy to specify the primary key as a single entity.
我们还使用由组成ejb主键的值构建的主键类使得把主键指定为一个单独的实体很容易。
Thus, if one encrypts a message using the public key of an entity, then it is guaranteed that only the entity can decrypt the message.
这样，如果使用实体的公钥加密消息，那么可以保证只有该实体能够解密此消息。
The private key is only known (or should only be known) to the entity that owns the key pair.
私钥（或应该）只有拥有密钥对的实体知道。
Your entity class must have matching fields on the class or it can embed the key as an embeddable key
您的实体类必须在类上具有匹配字段，或者它可以作为可嵌入键嵌入该键
In this test, we created a single entity named OgisCustomer, which has four member attributes including the primary key (SRCSEQ).
在该测试中，我们创建了一个名为ogiscustomer的实体，它有包括主键(SRCSEQ)在内的4个成员属性。
An Entity class needs a primary key.
Entity类需要一个主键。
Click the Employee entity, and select empno its primary key.
点击Employee实体，并选择empno作为它的主要关键字。
RDA's content assist key (ctrl+space) displays the defined words when you select an entity or attribute name Figure 4 shows.
当选择一个实体或属性的名称时，RDA的内容辅助键（ctrl+space）会显示已定义的词，如图4 所示。
On the primary key Tasks page, select deptno as the primary key for the Department entity.
在主要关键字Tasks页面中，选择deptno以作为Department实体的主要关键字。
If there is an existing collection of runners, the new runner instance key is added to it; otherwise, a new collection is created and the runner's key (the id property on the entity) is added to it.
如果有一个现成的runners的collection，则新的runner实例键将添加到它；否则，将创建一个新的collection，且这个runner的键(实体上的id属性)将添加到它。
To find an individual entity by its key, you simply invoke the get method, which takes a class type and the key.
为根据键找到个别实体，您仅需调用get方法，该方法接受一个类类型和键。
The key to the dependency-injection approach is that you query data by injecting the Class of the entity that the DAO will be querying, along with defining the generic type.
依赖项注入方式的关键是，在查询数据时，要注入DAO将查询的实体的Class并定义泛型类型。
For example, if account Numbers are assigned across all types of accounts, account type may need to be used along with account Number to form the primary key of the accounts entity.
例如，如果所有类型的账户都被指定一个AccountNumber，那么可能需要使用AccountType和AccountNumber一起作为Accounts实体的主键。
The relationship is represented by a new CMP entity bean called Attendee, having two fields (three if we count the primary key field).
用名为attendee的新CMP实体bean表示关系，该bean有两个字段(如果加上主键字段则有三个)。
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