网络虚拟物体; 空物体层; 空对象; 是空对象; 空宾语
双语例句
In Java, it is a common practice to assign a null value to a reference type when it is not referencing any object. 在Java中，当引用类型没有引用任何对象时将其赋空值，这是公共的操作。
SDOs can have data object properties that can be any of the simple PHP scalar types: string, integer, float or Boolean, as well as NULL or a reference to another SDO. SDO的数据对象属性可为任意简单PHP标量类型：字符串、整型、浮点、布尔，还可以是NULL或另一个SDO的引用。
The unit test methods first verify that the object provided is not null, and then perform one or more very basic actions on the object. 单元测试方法首先验证所提供的对象不是空的，然后对该对象执行一个或多个非常基础的操作。
In Ruby, however, even null is an object. 但是在Ruby中，甚至null也是一个对象。
Otherwise, there can be confusion over whether an empty array is a null object, an array with no elements, or an array with a single object containing null or empty values. 否则，可能对一个空数组是null对象还是没有任何元素的数组，亦或带有一个对象且此对象包含null或空值的数组产生混淆。
If no comment is associated with a given purchase order object, you might expect this column to be null after persisting the entity. 如果没有任何注释与给定订单对象相关，那么您可能希望在持久化实体后将该列设为null。
If you call Hotel. findByName(" Marriott") and that Hotel doesn't exist in the table, you'll get a null object in return. 如果调用Hotel.findByName（“Marriott”），并且Hotel不存在表中，就会返回一个null对象。
Listing 3 initializes a new Zend_Soap_Server object in non-WSDL mode, passing a null value as the first argument to the object constructor. 清单3传递一个null值到对象构造函数的第一个参数，以非WSDL模式初始化了一个新的ZendSoapServer对象。
By design, a newly created JAXB object is "shallow", which means if it contains complex types in its tree structure, these objects are not created and are just null. 根据定义，新创建的JAXB对象是“浅对象”；也就是说，如果它的树结构中包含复杂的类型，那么并不创建这些对象，它们仅仅是null。
When the output is complete, the stream is flushed by writing a NULL object to the client stream and loop awaiting the next client. 输出完成后，通过向客户端流写入一个NULL对象，而且循环等待下一个客户端，从而刷新流。
For that effect, JSON defines the following main data structures: number, string, boolean ( true and false), array ( an ordered sequence of values), object ( collection of key value pairs), and null. 为了实现该目的，JSON定义了以下主要数据结构：数字、字符串、布尔值（真或假）、数组（值的有序排列）、对象（键值对集合）和null。
A code block is simply a block of code that returns a value, and if no value is returned then a NULL object is returned. 代码块就是将返回一个值的一组代码，如果没有返回值，那么会返回一个NULL对象。
The sendRequest() function sets the Content-Type header if the body parameter isn't null and calls the send() method of the request object. 如果body参数不是null，sendRequest（）函数就会设置Content-Type头并调用request对象的send（）方法。
Bottom line: Any value-binding expression that does not resolve to an object managed by Seam will be null when a method is executed through the Seam Remoting API. 底线是：当方法通过SeamRemotingAPI执行时，任何不解析成由Seam管理的对象的值绑定表达式都将是null的。
It is kept NULL for un-named event object. 对于无名的事件对象来说，该值是NULL。
What you get in your arguments are a reference to the "this" object ( this is for object methods and is NULL for plain old functions like bar()) and an argument tuple in args. 您从参数中得到的是一个对“this”对象的引用（this用于对象方法，对类似bar（）这样的无参数的老式函数来说是NULL）和一个存储在args中的参数元组。
The cause of null pointers can be varied, but generally it means that either you haven't initialized an object, or you haven't checked the return value of a function. 由于空指针能够被改变，但通常它意味着你不能初始化一个对象或者你不能检查一个函数中的返回值。
Unfortunately, many designers have still not learnt that the special NULL pointer or null object is an equally bad idea. 遗憾的是，许多设计者并没有认识到空指针或空对象带来的危害。
This field is NULL when no charmap is selected, which typically happens when you create a new FT_Face object from a font file that doesn't contain a Unicode charmap ( which is rather infrequent today). 当没有字符表被选中时，该字段为NULL。这种情况在你从一个不含Unicode字符表的字体文件（这种文件现在非常罕见）创建一个新的FTFace对象时发生。
If it is NULL, the dialog object's parent window is set to the main application window. 如果这个参数为空，对话框对象的父窗口被设置到应用程序主窗口。
When Java sees null, it recognizes that the reference in question isn't pointing to an object. 一旦Java看到null，就知道该句柄并未指向一个对象。
A disadvantage of returning null is that it forces a caller to check for null each time an object is obtained from the pool. 返回null的缺点是，它强迫调用方在每次从池中获得对象时都检查是否为null。
Acquisition of English null object construction by Chinese learners of English: An interface perspective of discourse, semantics and syntax 中国英语学习者对英语空宾语结构的习得&语篇、语义与句法接口的视角
If the app doesn't want to do anything special for this ID, it returns NULL, and the window function senses this and news up the appropriate default object. 如果程序不需要这个ID，则返回NULL，窗口函数根据返回值创建恰当的默认对象。
The second parameter ( state) can either be null or an object containing application-specific information. 第二个参数（state）可以为空或者是包含程序规范信息的对象。
I will provide a uniform explanation for OSC in this dissertation: V2 ( with its null subject and null object) is essentially a purpose clause modifying the matrix clause. 本文为动词同宾结构提供了一个统一的解释：这些句子中的V2（连同其空主语和空宾语）本质上是目的性状语从句。
Genuine VP ellipsis construction rather than null object construction takes place in Chinese due to the strong feature of the light verb. 汉语中存在真正的动词短语省略，而不是空宾语结构（nullobjectconstruction）。这归功于轻量动词的强特征。
The null subject cannot be an empty pronominal that must observe Generalized Control Rule and the null object cannot be a variable which may change its status of identity in the process of syntactic derivation. 关系从句中的空主语并不是必须遵守普遍控制原则的空代词，而空宾语也不是在生成中能改变身份的变项。
But traced back to cognitive motivations, all categories of Null Object are used to fulfill the principle of economy of linguistic expression and cognitive processing. 但追根溯源，从认知动机的角度看，宾语省略的各种形式都是为了在语言的使用过程中实现语言表达与认知处理的经济性原则。
In Mandarin Chinese, one focus of the researches is on whether the Null Object Construction is a kind of Verb Phrase Ellipsis. 在汉语中，研究的一个焦点在于空宾结构是否是动词短语省略结构。