If one exists, it is pulled and used.
如果存在，就将其调出使用。
But the difference if one exists is of degrees only.
但是如果真的有什么区别的话，那只是程度上的。
The first difference (if one exists) may be either positive or negative.
第一个差值(如果存在的话)正负均可。
Create a new transaction, suspending the current transaction if one exists.
创建新的事务，如果当前存在事务，把当前事务挂起。
If one exists, the PresenceSession calls the notify method of the associated PresenceListener to deliver the notification.
如果存在一个新通知，PresenceSession将调用相关PresenceListener的notify方法来交付通知。
When the code requests any other string from the ResourceBundle, the string from messages_en.properties is used, if one exists.
当代码向ResourceBundle请求任何其他字符串时，如果messages_en . properties中有这样的字符串，就使用其中的字符串。
Obtains the reference for the table ID, value object class, session attribute for data rows, and session attribute for combo box if one exists.
取得对表格ID、值对象类、数据行的会话属性和组合框（如果有的话）的会话属性的引用。
However, the amount of work that can be done using a RESTful machine-readable description, if one exists today, is limited. This is due to the following.
然而，使用RESTful的机器可读描述可做的工作量，即使存在的话，其作用也有限。
The static Current property uses the Stack.Peek method to return the T instance at the top of the stack if one exists, returning null if the Stack is empty.
静态Current属性使用Stack.Peek方法返回位于堆栈顶端的T实例（如果存在），如果Stack 为空则返回空。
The preferred way to reference an assembly is to use a full reference, including the assembly name, version, culture, and public key token (if one exists).
引用程序集的首选方式就是使用完全引用，包括程序集名称、版本、区域性和公钥标记(如果存在)。
The name of the environment variable is first matched for exact case, but if no exact case match is found, it will pick a match ignoring case if one exists.
环境变量的名称是第一个匹配的确切情况，但如果没有确切的情况下，找到匹配忽略大小写的情况下，如果存在的话，它会选择一个匹配。
However, if you place a declarative security check at the member level, it applies to only that member and overrides the permission specified at the class level, if one exists.
然而，如果您将一个宣告式安全性检查置于成员等级上，它只会套用至该成员，并覆写在类别等级上所指定的使用权限(如存在时)。
To determine if a fully assembled cord, cord guard, or housing assembly has adequate strength to withstand repeated abusive flexing and to determine the failure mode if one exists.
目的是为了检验装配的电线、尾档和装配胶壳是否能承受外界反复的弯曲，并找出其失败的方式。
While physicists have demonstrated entanglement with specially prepared atoms, no-one knows if it also exists between atoms making up human minds.
尽管物理学家已经证明了特制原子之间存在纠缠，但没人知道它是否也存在于组成人类思维的原子之间。
If only one album exists, I just take it.
如果只存在一个唱片，我就选择它。
If only one album exists anyhow, I just take it.
总之，如果只存在一个唱片，我就选择它。
If the pattern exists on only one run-time, that can help you in making your decision.
如果该模式仅在一个运行时上存在，则可以帮助您做出决策。
Make sure before you drop that it is under the correct category, if more than one exists.
如果存在的不止一个，并确保您在放置它之前它是在这个正确目录之下的。
This destination will be prepended to the reverse routing path (if one already exists) as the message travels through that destination.
在消息经过该目的地时，将为反向路由路径(如果已经存在一项)预先计划这个目的地。
If no message exists, the operation does not wait around for one; it simply prepares another refresh Response with a new refresh interval period and returns that back to the caller.
如果符合条件的消息不存在，操作并不会等待消息的出现。它只是简单地用一个新的刷新间隔周期来组装一个刷新响应并将它返回给调用者。
If an entry for a user already exists, you can append the entry for abusers by separating it from the previous one using a comma.
如果用户的条目已经存在，那么您可以为不正常的使用者追加相应的条目，使用逗号将其与前面的条目隔开。
After the pipe has been created (or if one already exists), each pipe's output is read into the recorded event variable for that window.
在创建了管道(或者如果已经存在一个管道)后，每个管道的输出将被读入到该窗口记录的事件变量中。
The vast majority of existing studies have not found a link between phones and cancer, and if such a link exists, it is unlikely to be a large one.
现有绝大多数的研究都还未找到手机和癌症之间的联系，如果存在这样的联系，这也不可能是个大的联系。
When you're a beginner, it is normal to do some mistakes.But if your blog exists since approximately one year, if you work a lot but do not see good feedback, you'll have to improve your skills.
作为一个新手，犯一些错误很正常，但，假如你的博客已经历时大约一年，尽管你非常卖力但仍然没收到一封好的反馈信，这时你肯定需要提高自己的写作水平了。
Or, if no appropriate database exists, the system creates a new one and always returns 0 (see Listing 1).
或者，如果相应的数据库不存在，系统将创建一个新数据库并始终返回0(参见清单1)。
One of our reasons for staying single is that you can afford to wait for your true soul mate (if one even exists) to pop into the picture.
单身理由之一，你可以等待，直到真正的心灵伴侣出现(如果存在的话)。
If more than one Business Data Catalog application exists, you can choose to have multiple applications crawled in the applications section.
如果有多于一个BDC应用程序存在，我们可以在这里选择是否对多个应用程序进行爬网。
The constructor examines each property in its parameters argument; for each one, if the property exists in the prototype, then its value overrides the parameter's default value.
构造方法在它的parameters参数中检查每个属性；对于每个属性，如果它存在于原型中，那么它的值覆盖参数的默认值。
The constructor examines each property in its parameters argument; for each one, if the property exists in the prototype, then its value overrides the parameter's default value.
构造方法在它的parameters参数中检查每个属性；对于每个属性，如果它存在于原型中，那么它的值覆盖参数的默认值。
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