One-to-one relationship or NULL field for optional column?
一对一的关系或空字段为可选的列？
In fact, no sooner does he end one relationship than he begins another.
实际上，每当他结束一段恋情之后马上就会开始新得恋情。
A one-to-one relationship needs to be included between the user and subscription models.
用户与订阅模型之间需要包括一个一对一关系。
One relationship lasted for about four years and a half, the other lasted about three years.
第一个女朋友与我交往了四年半，另外一个跟我交往了三年。
What you’ve done here is to define a simple one-to-one relationship between objects of the two classes.
这里所做的是在这两个类的对象之间定义简单的一对一关系。
Family doctors: maintain one-to-one relationship with patients. Mostly through outpatient office visits.
家庭医生：与患者保持一对一联系。主要通过门诊看诊。
As we saw in our second strategy, there is a many-to-one relationship between the Right and Estate classes.
正如我们在第二个策略中看到的，在Right和Estate类之间存在着多对一关系。
You can have a one-to-one relationship between a single unit of your content or a one-to-many relationship.
在每个内容单元中，您可以使用一对一的关系，也可以使用一对多的关系。
If B has a navigation reference property to a (one-to-one relationship) it will assign a to this property.
如果B有一个导航参考属性a(一对一的关系，它将分配)A这一特性。
As you can see in Listings 1 and 2, I've logically modeled a many-to-one relationship between runners and a race.
您可以从清单1和2看到，我在选手和比赛之间逻辑上建立了一个多对一的关系。
A one-to-one relationship is created if both of the related columns are primary keys or have unique constraints.
当两个相关列都是主键或都具有唯一约束时，将创建一对一关系。
In a one-to-one relationship, a row in table a can have no more than one matching row in table b, and vice versa.
在一对一关系中，表a中的一行最多只能与表b中的一行相匹配，反之亦然。
Also an Oracle instance can only have a one-to-one relationship with a database, while in DB2 this is not the case.
而且，Oracle实例与数据库只能是一对一的关系，而在DB 2中却不是这样。
I need to add two additional annotations to it, to create a many-to-one relationship between Locations and Accounts.
我需要向它添加两个额外的注释，以在Location与Account之间创建一种多对一的关系。
Another type of mapping is when a table might have a one-to-one relationship but your object model only has one object.
另一映射类型是，表可能有一对一关系，但对象模型只有一个对象。
There exists one-to-one relationship between the sequence structure element's size and the space scale of geography entity.
序列结构元素尺寸与地理实体的空间尺度之间存在着一一对应的关系。
"If you sustain growth, you will also sustain poverty reduction, because it's basically a one-to-one relationship," says Karlsson.
“如果继续保持增长，就可以继续减轻贫困，因为这基本上是一种一对一的关系，”Karlsson说。
A one-to-one relationship was established between proxy and invoker objects, with the explicit interface being the common association.
代理和调用程序对象之间建立了一对一的关系，而显式接口则充当了常用的关联方式。
Walter's death drove his son further into solitude and deeper into a one-on-one relationship with his computer, say friends and family members.
Katz的朋友和家人说，Walter的去世让作为儿子的他更为孤独，并且让他更加和计算机深陷在一起。
An arrow leading from Band to ContactInfo is marked with a 1 on the ContactInfo side, indicating a one-to-one relationship between the two classes.
从Band指向ContactInfo的箭头在ContactInfo旁边标有一个1，这说明两个类之间是一对一的关系。
This means that your server is constantly "moving" on the Internet and it messes up the one-to-one relationship between domain names and IP addresses.
这就是说，您的服务器是不断“移动”在互联网上和它的餐厅了一对一的关系，域名和IP地址。
JAX-RPC requires that a service-specific exception have a constructor equipped with parameters in a one-to-one relationship with all gettable properties.
JAX - RPC要求，具体服务的异常拥有一个构造函数，该构造函数的参数与所有的可获得的属性是一对一的关系。
The analysis shows that self-organization phenomena occur not only in one relationship network but also in the whole network, if each network is connected.
分析表明，当每个网连通时，不仅每个网上合作竞争关系出现自组织现象，而整体也出现自组织现象。
For the French, friendship is one-to-one relationship that demands a keen awareness of the other person's intellect, temperament, and particular interests.
在法国人看来，友谊是一对一的关系，要求彼此非常了解对方的才智、性情以及特殊的爱好。
For some, being single is no longer a natural phase between the end of one relationship and the beginning of another but somewhere they have become trapped.
对某些人来说，单身不再是一段关系结束，另一段时间开始的自然阶段，而是陷入的一个地方。
NET MVC, controllers define action methods that usually have a one-to-one relationship with possible user interactions, such as clicking a link or submitting a form.
NETmvc中，控制器会定义通常与可能的使用者互动拥有一对一关系的动作方法，例如按一下连结或送出表单。
Coded character set a set of unambiguous rules that establishes a character set and the one-to-one relationship between each character of the set and its bit representation.
建立字符集和在不同的字符集及其表示一对一的映射关系，要有明确的规则。
Coded character set a set of unambiguous rules that establishes a character set and the one-to-one relationship between each character of the set and its bit representation.
建立字符集和在不同的字符集及其表示一对一的映射关系，要有明确的规则。
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