高级语言是一种以英文为基础的设计语言， 其中的运算符和表达式都和通常的数学公式类似。
The high-level language is a programming language based on English. Its operators and expressions are similar to ordinary mathematical formulas.
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.
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。
Expression nodes support simple expressions involving arithmetic and Boolean (true or false logic) operators.
而子表达式又可使用and、or和not逻辑运算符组合起来。
And the subexpressions can be combined using the and, or, and not logical operators.
最后，- a和- o选项允许使用逻辑运算符and和OR将表达式组合在一起。
Finally, the -a and -o options allow you to combine expressions with logical and and OR, respectively, while the unary!
注意数值型的字面值不包括符号(译注：正负号)，像-1实际上是个组合了一元运算符“-”和字面值1的表达式。
Note that numeric literals do not include a sign; a phrase like -1 is actually an expression composed of the operator - and the literal 1.
公式节点中的运算符和语法同样适用与表达式节点。
The same operators and syntax of the Formula Node apply to the Expression Node.
注意数值型的字面值不包括符号(译注：正负号)，像-1实际上是个组合了一元运算符“-”和字面值1的表达式。
Note that numeric literals do not include a sign; a phrase like -1 is actually an expression composed of the unary operator '-' and the literal 1.
后缀和前缀增量运算符表达式中的评价如何？
How is the postfix and prefix increment operator evaluated in an expression?
使用目前常用的算符优先法，对通用表达式计算过程进行了介绍，并对其中的关键问题——运算符优先矩阵的设计和实现进行了研究。
Using the current commonly used operator priority method, introduces a common expression of the calculation process, and one of the key issues, operator precedence matrix design and implementation.
在查询中使用列的任何位置，都还可使用由列、文本、运算符和函数的任意组合组成的表达式。
Wherever you use a column in a query, you can also use an expression that can consist of any combination of columns, literals, operators, and functions.
在无法复制到SQL中的表达式中使用增量和减量运算符时会产生副作用，因而不支持此类运算符。
Increment and decrement operators cause side-effects when you use them in expressions that cannot be replicated in SQL and are, therefore, not supported.
在无法复制到SQL中的表达式中使用增量和减量运算符时会产生副作用，因而不支持此类运算符。
Increment and decrement operators cause side-effects when you use them in expressions that cannot be replicated in SQL and are, therefore, not supported.
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