To use a table subquery, you need to use an SQL operator to combine the embedded query with a Boolean expression.
要使用表子查询，需要使用SQL操作符将嵌入式查询与布尔表达式组合在一起。
The constraint attribute contains a Boolean expression, which defines the condition to which the data is constrained.
constraint属性包含一个布尔表达式，它定义数据必须符合的条件。
Each link may be associated with a transition condition, which is a Boolean expression using values in the different containers of the process.
每个link可与一个转变条件相关联，这个条件是使用流程的不同容器中的值的布尔表达式。
However, without the square brackets the XQuery expression is a Boolean expression which always returns a Boolean value and never the empty sequence.
然而，如果不使用方括号，XQuery表达式就是一个总是返回boolean值的Boolean表达式，而不会返回空序列。
An event subscription contains a filter, which is a Boolean expression that evaluates to true for events it subscribes to and to false for all other events.
事件订阅包含筛选器，这是一个布尔表达式，对所订阅的事件求值为True，对其他所有事件求值为False。
As the name implies, each if-then rule consists of a Boolean expression that determines whether to execute one or multiple actions specified in the then clauses.
和其名称一样，每个if -then规则包含一个Boolean表达式，用于确定是否执行在then子句中指定的一个或多个操作。
The if statement supports an optional else clause that indicates a block of program statements that should be processed if the Boolean expression evaluates False.
if语句支持一个可选的else子句，指示当布尔表达式计算为False时应该处理的程序语句块。
Up to this point, you've seen how the if statement can be used to execute one of two blocks of program statements, depending on the value of a particular Boolean expression.
至此，已经看到了if语句可以如何用于根据一个特定布尔表达式的值，来执行两个程序语句块中的其中一个。
XPath provides primitives for moving around the XML tree, for selecting nodes according to name or by the use of a Boolean expression, and for applying functions to a sequence of nodes.
XPath支持在XML树中移动、根据节点名称或通过使用Boolean表达式选择节点以及对一系列节点应用函数。
This paper applies the characters of primes in the mathematical theory of Numbers transfers the symbolic computation into value computation and designs a tool of Boolean expression simplification.
运用数论理论中素数的性质和特点，将符号计算问题转化为数值计算问题，设计了一个布尔表达式化简工具。
This paper applies the characters of primes in the mathematical theory of Numbers transfers the symbolic computation into value computation and designs a tool of Boolean expression simplification.
运用数论理论中素数的性质和特点，将符号计算问题转化为数值计算问题，设计了一个布尔表达式化简工具。
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