如果一个表达式的逻辑不容易理解，则需要试着改变其形式。
If a logical expression is hard to understand, try transforming it.
Bonita提供了一个GUI，它可以根据您应用程序的业务逻辑来配置变量，并且可以基于流程变量来评估数学及逻辑表达式。
Bonita provides a GUI for configuring variables according to your application's business logic and evaluating mathematical and logical expressions based on process variables.
设想一个逻辑操作表达式，例如port . signal. send 。
Imagine a logical action expression, such as port.signal .send .
它表示一个正则表达式并提供了使正则表达式与字符串相匹配的逻辑。
It represents a regular expression and provides the logic to match the regular expression against strings.
实际上，策略表达式只是使用一个尖括号格式的逻辑表达式，断言是子句。
Policy expressions really are just logic expressions using a pointy-bracket format, with assertions as clauses.
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.
逻辑上，每个规则表达式都等价于一个状态机，而每个规则表达式的语法分析器都实现这个状态机。
Every regular expression is logically equivalent to a state machine, and the parser of every regular expression implements a state machine.
表达式可以简单到就是一个变量（如清单2 所示）或者是一个方法调用（例如getList()），亦或是包含布尔逻辑或三目运算符的复杂表达式。
This expression can be as simple as a variable (as shown in Listing 2) or a method call (like getList()), or a complex expression that involves boolean logic or a ternary operator.
实际上，策略表达式只是使用一个尖括号格式的逻辑表达式，断言是子句。
Policy expressions really are just logic expressions using a pointy - bracket format, with assertions as clauses.
用在数学或者逻辑表达式里代表一个可变量的符号。
That is used in mathematical or logical expressions to represent a variable quantity .
用在数学或者逻辑表达式里代表一个可变量的符号。
A symbol that is used in mathematical or logical expressions to represent a variable quantity.
用在数学或者逻辑表达式里代表一个可变量的符号。
A symbol that is used in mathematical or logical expressions to represent a variable quantity.
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