使用布尔运算符执行多个关键字搜索。
请注意，可使用布尔运算符组合多个条件。
Note that multiple conditions are combined by using Boolean operators.
在与布尔运算符用于创建更复杂的表达式。
Used in conjunction with Boolean operators to create 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。
Basic Search allows you to use + and - but you can not use Boolean operators or more complex expressions.
子表达式运营商。在与布尔运算符用于创建更复杂的表达式。
Subexpression operators. Used in conjunction with boolean operators to create more complex expressions.
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。
It makes your conditional expressions more readable; avoiding the use of Boolean operators.
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。
An expression is defined as a series of one or more query terms joined by the Boolean operators and or or.
过滤条件可以指定为列名，其后跟等式、不等式或布尔运算符，然后是过滤值。
Filter criteria are specified as the column name, followed by an equality, inequality, or Boolean operator, followed by the filter value.
一种布尔运算符，当与其相关联的两个变量中仅有一个为真时，其真值表才取值为真。
Boolean operator that gives a truth table value of true if only one of the two variables it connects is true.
17 Google加进对OR运算符，终于开始支持布尔运算符了(2001年1月份)。
Google has finally begun introducing some support for Boolean operators with the addition of an or operator. "(that's from January 2001)."
17 Google加进对OR运算符，终于开始支持布尔运算符了(2001年1月份)。
Google has finally begun introducing some support for Boolean operators with the addition of an or operator. "(that's from January 2001)."
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