If the string to be searched is not found and neither argument is null, the result is 0.
如果没有找到搜索字符串，并且参数都不为空，则所得的结果是0。
If the host is not defined already, the output is null.
如果还没有定义该主机，那么输出将为空。
If this checkbox is not selected, the generated WSDL is set to (null), as shown in Listing 7.
如果这个复选框没有选择，那么产生的WSDL的设置为(空的)，如列表7所示。
Initially, this routine checks if the passed inquiry context is not NULL and is for a group member inquiry.
这个例程首先检查传递的查询上下文是否非null，以及是否是用于组成员查询的上下文。
If the customer number is not null, that is, the customer is already known, the left hand path is followed (2), and the customer data is retrieved from the customer registration service (3).
如果客户编号不为空，即客户是已知客户，则遵循左侧的路径(2)，并从客户注册服务中检索客户数据(3)。
If a default value is not specified, the variable is initialized to NULL.
如果没有指定默认值，则初始变量为NULL。
For example, if a before trigger supplies value to a NOT NULL column, then the before trigger is executed first and a value is supplied to the column so that the NOT NULL constraint isn't violated.
例如，如果一个BEFORE触发器给一个NOT null列提供值，那么先执行BEFORE触发器，给列提供值，所以不会违反NOT NULL约束。
A cheque is null and void if any one of the particulars mentioned in the preceding paragraph is not specified thereon.
支票上未记载前款规定事项之一的，支票无效。
If the value is not null, it is converted into an int value.
如果值尚未为null，那么它会被转化为一个int值。
If the HTTP method is GET (currently not used by JSF forms), the form data has already been appended to the URL and send is called with a null parameter.
如果HTTP方法是GET(当前未被JSF表单使用)，那么表单数据应该已经追加到此url，并会用null参数调用send 。
The reason the idiom in Listing 3 is deficient is because obj is not guaranteed to be non-null after the body of the if block completes.
清单3中的风格不够好的原因在于，if块的主体结束之后ob j不一定是非空值。
If the corresponding class, field, or method is not generic, a null value is passed when calling the method.
若相应的类、字段或方法非泛型，则在调用方法时将返回null值。
If the value of the transportTModelKey parameter is not null, then a transport categorization keyedReference is added; its value is the value of the transportTModelKey parameter.
如果transportTModelKey参数的值不为空，就添加一个传输类别 keyedReference ；它的值即是 transportTModelKey 参数的值。
In Oracle 10g, if there is a BEFORE INSERT TRIGGER and a NOT NULL constraint on a table, then the BEFORE TRIGGER is executed first, and then the constraint check is performed.
在Oracle10g中，如果表上同时存在BEFORE INSERT触发器和NOT NULL约束，那么先执行BEFORE触发器，然后执行约束检查。
In Oracle 10g, if there is a BEFORE INSERT TRIGGER and a NOT NULL constraint on a table, then the BEFORE TRIGGER is executed first, and then the constraint check is performed.
在Oracle10g中，如果表上同时存在BEFORE INSERT触发器和NOT NULL约束，那么先执行BEFORE触发器，然后执行约束检查。
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