也可以建立布尔表达式以调用方法。
You can also set up the Boolean expression to call a method.
但是布尔表达式实际上测试什么？
遍历表达式的第三部分是布尔表达式。
The third part of the traversal expression is a Boolean expression.
在bash中，所有布尔表达式都用方括号括起。
In bash, all Boolean expressions are enclosed in square brackets.
XPath的另一个特点是能够计算布尔表达式。
Another nice feature of XPath is its ability to evaluate Boolean expressions.
布尔表达式：一种值为真或假的表达式。
这就是以Boolean这个人，的名字命名的布尔表达式。
That's what's called a Boolean expression named after literally a man named Boole.
可以使用布尔表达式在单个QueryFilter定义中定义多个条件。
We can define multiple conditions in a single Query Filter definition by using Boolean expressions.
在你驱动的检测创建中，ASSERT产生代码来评价布尔表达式。
In the checked build of your driver, ASSERT generates code to evaluate the Boolean expression.
您可以限制搜索的类别，还可以使用布尔表达式和模式匹配来进一步精化搜索。
You can limit the categories that are searched, and you can use Boolean expressions and pattern matching to further refine the search.
constraint属性包含一个布尔表达式，它定义数据必须符合的条件。
The constraint attribute contains a Boolean expression, which defines the condition to which the data is constrained.
第一类方法适用于和之积范式，第二类方法适用于任意布尔表达式。
The first class of methods is available for canonical product of sums form and the second one is available for arbitrary boolean expressions.
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。
To use a table subquery, you need to use an SQL operator to combine the embedded query with a Boolean expression.
这是摆立即在前面的功能，操作员，或子表达式扭转布尔表达式的意义。
This is placed immediately in front of the feature, operator, or subexpression to reverse the Boolean meaning of the expression.
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。
General opinion is that developers don't understand how to use these operators and frequently mistake them for their Boolean equivalents.
断言表示为一些布尔表达式，程序员相信在程序中的某个特定点该表达式的值为真。
Assertions represent Boolean expressions that the programmer believes to be true at specific points in the program.
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。
Each link may be associated with a transition condition, which is a Boolean expression using values in the different containers of the process.
使用布尔表达式定义契约引起争议的第三种情况是在非功表达式契约定义能性契约上。
The third occasion where defining contracts using Boolean expressions raises issues is non-functional contracts.
NOT运算符。这是摆立即在前面的功能，操作员，或子表达式扭转布尔表达式的意义。
The NOT operator. This is placed immediately in front of the feature, operator, or subexpression to reverse the Boolean meaning of the expression.
布尔表达式允许你告诉，当你触碰到鼠标指针，也就是小箭头，程序就相应地做一些事情？
Scratch This Boolean expression allows you to say to scratch if you are touching the mouse pointer, the little arrow, do something. How do we do something?
这也就是布尔表达式的使用方法，比如在一继续方法比如个if-then-else块中。
That's exactly how Boolean expressions properti express boolean are used, for example, in an if-then-else construction.
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。
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.
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。
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.
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。
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.
现在，如果我们碰下鼠标指针，起初我们看到一个布尔表达式，播放猫叫的声音，等几秒钟，然后如刚才那样做检测。
And now, if I'm touching mouse pointer, we saw that Boolean expression before, play sound meow, wait a couple of seconds, and then just keep checking.
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.
最后，为了建立一个单一的布尔表达式描述真值表作为一个整体，我们同这四个产品的布尔表达式一起此外。
Finally, we join these four Boolean product expressions together by addition, to create a single Boolean expression describing the truth table as a whole.
有几件事情是你必须做到的：你要清楚怎样用不同的进制表示一个数，还要知道如何用布尔逻辑计算布尔表达式。
There are a couple of things you should definitely be aware of: you should understand how to represent Numbers in different bases and how to manipulate Boolean expressions using Boolean logic.
比如，可使用清单14中的代码来实现和清单13类似的效果，这一次在迭代全部CD的过程中使用了xpath布尔表达式。
For instance, you could use the code in Listing 14 to achieve an effect similar to that shown in Listing 13; this time, all CDs are iterated over, and a Boolean XPath expression is applied.
很多程序利用布尔表达式，Python提供一整套布尔比较和逻辑运算，详细信息请分别参见表1 和表2。
Many programs utilize Boolean expressions, and Python provides the full range of Boolean comparison and logical operations, as detailed in tables 1 and 2, respectively.
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