Use Boolean operators to perform multiple keyword searches.
使用布尔运算符执行多个关键字搜索。
Listing 1 shows the process of doing searches with Boolean operators.
清单1显示了如果利用布尔操作符进行查询的过程。
You can combine such expressions with Boolean operators (AND, or, NOT).
可以使用布尔操作符(AND,OR,NOT)组合这些表达式(AND, OR, NOT)。
Standard Boolean operators are available, such as and, or, xor and not.
可以使用标准的布尔操作符，比如and、or、xor和not。
Note that multiple conditions are combined by using Boolean operators.
请注意，可使用布尔运算符组合多个条件。
Used in conjunction with Boolean operators to create more complex expressions.
在与布尔运算符用于创建更复杂的表达式。
It makes your conditional expressions more readable; avoiding the use of Boolean operators.
它使你的条件表达式变得更加可读，避免了布尔运算符的使用。
The following Boolean operators can be used to combine terms. Note that they must be CAPITALIZED !
下面的逻辑检索词可以用来联合检索词进行检索。注意：这些词在使用时必须大写！
Basic Search allows you to use + and - but you can not use Boolean operators or more complex expressions.
基本搜索允许您使用+和-，但不能使用布尔运算符或更复杂的表达式。
An expression is defined as a series of one or more query terms joined by the Boolean operators and or or.
一个表达式就是一系列由布尔运算符and或or连接的一个或更多查询项。
The syntax of the language is simple, and is composed of only a few keywords and the standard Boolean operators.
语言的语法很简单，只包含几个关键词和标准布尔操作符。
Invalid query: make sure parenthesis are balanced and the custom query consists only of valid criteria Numbers and the Boolean operators and, or, and NOT.
查询无效：确保括号完整，自定义查询只包含有效标准数字以及布尔型运算符and、OR和NOT。
However, mathematical operators are not the only operators you are given. There are Boolean operators to help you with logical circuits or logical decisions.
不管怎样，数学操作符是不仅仅是你给出的操作符。有一些布尔型的操作符还能够帮助你用合理的思路或合理的逻辑判定。
Take advantage of advanced search functionality (gasp!) such as plurals, truncation, and wild-card and Boolean operators when using your local library catalog or databases.
利用先进的搜索功能，比如当你搜索当地的图书馆目录或数据库时，使用复数、关键词、通配符和布尔操作符。
This paper makes an analysis of the features of accessing the EPO (European Patent Of- rice) website with its system, category, pattern, sub-field retrieval, Boolean operators discussed.
本文从检索体系、检索范围、报道形式、检索字段、检索算符及显示结果等五个方面，对欧洲专利局网站的检索特点做了深入的解剖。
Expression nodes support simple expressions involving arithmetic and Boolean (true or false logic) operators.
表达式节点支持包含算术和布尔(真或假逻辑)运算符的简单表达式。
In fact, you can combine any Boolean search operators, as long as your syntax is correct. An example: "sausage and mash" -onions filetype: doc.
事实上，只要你的语法正确，你可以混合使用任何布尔搜索运算符。
And also we characterize the linear operators that strongly preserve commuting pairs of matrices over Boolean algebras.
同时也刻画了布尔代数上强保持交换矩阵对的线性算子。
Bitwise operators perform Boolean algebra on the corresponding bits in the two arguments to produce the result.
按位运算符会对两个自变量中对应的位执行布尔代数，并最终生成一个结果。
General opinion is that developers don't understand how to use these operators and frequently mistake them for their Boolean equivalents.
一般的看法是，开发者不知道如何使用这些操作符，经常在布尔表达式中误用。
To test a bit field to determine whether a specific enumeration value is present, use the Boolean logical operators.
若要测试位元栏位，判断特定列举值是否存在，请使用布林逻辑运算子。
Unless this is so, the Boolean logical operators will not be able to extract the individual enumeration values that are stored in the field.
除非情况如此，否则布林逻辑运算子就无法抽取栏位中所储存的个别列举值。
Unless this is so, the Boolean logical operators will not be able to extract the individual enumeration values that are stored in the field.
除非情况如此，否则布林逻辑运算子就无法抽取栏位中所储存的个别列举值。
应用推荐