null

adj.

1. 零值的；等于零的
   having the value zero
   1. a null result
      毫无结果

1. PHRASE (协议、宣言或选举结果)无法律效力的，无效的
   If an agreement, a declaration, or the result of an election is null and void, it is not legally valid.
   1. A spokeswoman said the agreement had been declared null and void...
      女发言人称该协议已宣布无效。
   2. The declaration was null and void as it was proclaimed in completely illegal circumstances.
      该声明无效，因为它是在完全非法的情况下宣布的。

1. A spokeswoman said the agreement had been declared null and void
   女发言人称该协议已宣布无效。
2. The declaration was null and void as it was proclaimed in completely illegal circumstances.
   该声明无效，因为它是在完全非法的情况下宣布的。
3. The agreement will be considered null and void.
   该协议将被视作无效。
4. Objectify also provides a find method, which instead returns null.
   Objectify还提供一个find方法，而该方法返回null。
5. We added the NOT NULL flag to indicate that the fields must not be null.
   我们添加了NOTNULL标志来指示字段必须不能为空。
6. If the cpr attribute is true, a JavaScript variable is declared and initialized with null.
   如果cpr属性为true，就会声明一个JavaScript变量并由null对该变量进行初始化。
7. If this is null, the semaphore cannot be inherited.
   如果这个指针为空，那么这个信号量就不能被继承。
8. If this argument is null, then updatable cursors are used to modify the selected columns.
   如果该参数为null，则使用可更新的游标来修改所选的列。
9. Note that CPU and disk values can be specified as null if checking for user activity only is desired.
   注意，如果只希望检查用户活动，则可以将CPU和磁盘值指定为空。
10. If the lua_open() call fails, it returns a null pointer.
    如果luaopen（）调用失败，则返回一个null指针。
11. If null values are supplied, an error ( exception) will occur.
    如果提供了null值，将出现一个错误（异常）。
12. The fifth parameter to which we pass null in this example accepts an image instance.
    第五个参数（在本例中我们将null传递给它）接受一个图像实例。
13. Because the URLs returned by the default implementation of ClassLoader are null, which broke the callers code.
    因为ClassLoader的默认实现返回的URL是null，这个结果破坏了调用程序的代码。
14. The parameter can be NULL if the previous semaphore count value is not required.
    如果并没有请求上一个信号量计数器的值，那么这个参数可以是NULL。
15. NULL values in a column can be replaced by user-defined text using the NULL TEXT option.
    可以使用NULLTEXT选项将一个列中的NULL值替换为用户定义的文本。
16. This tag determines whether or not the field in the name attribute is null.
    这个标签确定name属性中的字段是否为空。
17. This method has one parameter that you can set to null or a number of other values.
    这个方法有一个参数，可以把它设置为null或许多其他值。
18. This function returns a pointer to the value in the environment or NULL if there is no match.
    这个函数会返回一个指向环境中的值的指针，或者如果不匹配则返回NULL。
19. An empty or null array is not a valid return value.
    空的或null数组不是一个有效的返回值。
20. At least one element in the specified array was null.
    指定数组中至少有一个元素为空。
21. Bernie: I told him I had null to do with this operation.
    伯尼：我告诉过他了，我和这桩生意没关系。
22. Returns NULL if the wrong passphrase or authenticator information is used.
    如果使用了错误的通行短语或验证器信息，则返回null。
23. The self-calibration scheme can also be extended to null system offset and gain errors in the input channel.
    自动校准方案也可以被扩展用来校准系统零点偏置和输入通道中的增益误差。
24. The marriage was declared null and void.
    婚事已宣告无效了。
25. Null value is not allowed in unique index or primary key.
    唯一性索引或主键中不允许有空值。
26. That Oliver gave you are both null and void.
    网址和密码，都已经无效了。
27. For example FindBugs and IntelliJ both define their own annotations to indicate when a method may return null.
    比如FindBugs和IntelliJ都定义了自己的注解，以表示方法何时返回null。
28. Data is Null. This method or property cannot be called on Null values.
    数据为空。不能对空值调用此方法或属性。
29. This parameter can be NULL.
    该参数可以为空。
30. Specify null to return information for all tables and views in the specified database.
    指定null可返回指定数据库中的所有表和视图的信息。

adj.

null and void

• 无法律效力的；无效的
  having no legal force; not valid
  1. The contract was declared null and void.
     合同被宣布无效。

noun

1. a quantity of no importance
   1. it looked like nothing I had ever seen before
   2. reduced to nil all the work we had done
   3. we racked up a pathetic goose egg
   4. it was all for naught
   5. I didn't hear zilch about it

   Synonym:    nothingnilnixnadaaughtciphercyphergoose eggnaughtzerozilchzipzippo

adj

1. lacking any legal or binding force
   1. null and void

   Synonym:    void