Examples of using Null value in English and their translations into Chinese
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What Is A Null Value?
零的绝对值是什么?A null value means that there is no value. .
一个null值意味着没有价值。Why do we need the null value?
为什么需要空值null.A null value("" or NULL) would create an error.
Null值（或空值）将生成一个错误（异常）。In these cases null value is used.
在某些情况下，需要使用NULL值。This absence of data is called a null value.
此缺失的数据称为null值。Others describe a null value as an unknown value. .
可以把Null值理解为一个未知的值。No key key may have a null value.
不存在的key将会得到一个null值。A null value indicates that the elements' natural ordering should be used.
Null值指示应该使用元素的自然顺序。A primary key cannot be a null value.
主键的值不可以是一个NULL值。The special null value does not belong to any of the types described above.
特殊的null值不属于上述任何一种类型。(Reference types already support the null value.).
引用类型已支持null值。If the message has a null value, then the value that will be stored is na.
如果该消息有一个空值,那么该值将被存储是na.Null:这种类型是用来存储一个Null值。If you are replacing the null value with other data, enter the new data in the Replace With box.
若要使用其他数据替换Null值，请在“替换为”框中输入新数据。Document 5 is returned even though it contains a null value.
Lt;1>文档5虽然包含了一个null值，仍被返回了。Solution to the"You tried to assign the Null value to a variable that is not a Variant data type.".
NET解决“试图将Null值赋予一个非Variant数据类型的变量”的问题.It forms a separate type of its own which contains only the null value:.
它构成一个独立的类型，只包含null值：.For example, you can use this function to convert a Null value to another value and prevent it from propagating through an expression.
例如，您可以使用该函数将Null值转换为其他值并防止它通过表达式扩散。Because all rows must be identified,primary keys cannot contain a Null value.
If the user clicks Cancel, a null value is returned.
如果用户点击取消，那么返回值为null。Not Null Constraint:-This is to ensure that the column does not have a null value.
NOTNULL约束:确保列不能有NULL值。The compiler analyzes the flow of your code to see if a null value could make it to where you use it:.
编译器会分析代码流，以查看null值是否可以将其用于当前位置：.None can be understood as 0 because 0 is meaningful andNone is a special null value.
要注意区分None与0，因为0是有意义的，而None是一个特殊的空值。For example, the null value: The one in Microsoft JScript behaves differently than the null value in the C or C++ languages.
例如，对于null值：JScript中这个值与C或C++语言中的Null值所起的作用是不一样的。In addition, a value-initialized object of the type must produce a null value of that type.
而且，该类型的值初始化必须生成该类型的空值。In computer science, a null value represents a reference that points, generally intentionally, to a nonexistent or invalid object or address.
在计算机学科，null值一直是一个被讨论点，通常来说，表示一个不存在或者无效object或者地址引用。None can be understood as 0 because 0 is meaningful andNone is a special null value.
空值：None，注意None不能理解为0，因为0是有意义的，而None是一个特殊的空值。Because it is an external API,attempting to retrieve a non-existent element returns a null value rather than undefined.
因为它是一个外部API，试图获取一个不存在的元素返回一个null值，而不是undefined。Otherwise, the shell interprets the trailing text as part of your variable name-and most likely returns a null value.
否则，Shell将把尾随文本解释为变量名称的一部分--并且很可能返回一个空值。
