The XSLT language gives the processor great freedom to evaluate expressions in any order it chooses, because of the absence of side effects.
XSLT语言给了处理器很大的自由，让它可以按其选择的顺序对表达式求值，因为它没有副作用。
Once you've created your factory, you need to move from it to an object that can actually evaluate expressions and interact with the XPath environment.
创建工厂之后，还需要从工厂转移到能够真正计算表达式并与XPath环境交互的对象。
This article will walk you through the highlights of W3Eval's functionality; you'll be able to look at some of the code it USES to evaluate expressions.
本文将让您从头至尾认识W3Eval功能性的要点；您将看到一些用于表达式求值的代码。
Its unique ability to evaluate expressions step by step is very handy, because the user can see each step of evaluation, together with temporary results.
它独特的能力(一步一步的对表达式求值)非常容易实现，因为用户能看到求值的每一步，包括临时结果。
There are several methods to selectively evaluate expressions in REBOL. These methods provide a way for evaluation to branch many different ways, based on a key value.
这里介绍几种REBOL中的选择语句，这些方法提供了一个按照关键值运行多种分支的方法。
A breakpoint is a point in a function at which code execution stops and the programmer is given the opportunity to inspect the value of variables, evaluate expressions, call functions, and so on.
断点是函数执行停止所处的点，从而让程序员有机会查看变量的值、表达式的值、调用函数等等。
Using what you have learned so far, you could now build a simple calculator to evaluate arithmetic expressions as shown in Listing 9.
使用迄今为止学到的东西，现在能够构建简单的计算器来计算算术表达式，如清单9所示。
In essence, the goal here is to create a small language that allows users to type in relatively simple algebraic expressions that this code will evaluate and produce a result.
其实，这里的目标是要创建一个小型语言，这个语言能够允许用户来输入相对简单的代数表达式，然后这个代码来为它求值并产生结果。
The DSL being built here is a simple calculator language, designed to take mathematical expressions and evaluate them.
这里构建的DSL是一个简单的计算器语言，用于获取并计算数学表达式。
SpamAssassin (and similar tools) evaluate a large number of patterns — mostly regular expressions — against a candidate message.
对要识别的消息，SpamAssassin(及其它类似工具)评估了大量的模式—大多数是正则表达式。
If none of the XPath expressions evaluate to true, the default type definition (xs: string) is selected.
如果没有XPath表达式的值是true，那么选择默认的类型定义(xs：string)。
In fact, all expressions in XPath 2.0 and instructions in XSLT 2.0 evaluate to sequences, so that a single node or a single atomic value is really a sequence containing that one item.
实际上，XPath 2.0中所有的表达式和XLST 2.0中的指令都对序列求值，因此，单独的节点或者原子值实际上是包含一个项的序列。
If none of the XPath expressions evaluate to true then the default type definition is selected as the type for the element.
如果所有XPath表达式的值都不是true，那么将选择默认类型定义作为元素的type。
The XPath expression interpreter to evaluate XPath expressions and return their values
用于对XPath表达式求值并返回这些值的 XPath表达式解释器
Another nice feature of XPath is its ability to evaluate Boolean expressions.
XPath的另一个特点是能够计算布尔表达式。
If the type attribute has none of these values, the XPath expressions for the first three type alternatives will evaluate to false.
如果类型属性的值不是这三个值，前三个类型替换的XPath表达式将计算为false。
Create and evaluate XPath expressions.
创建和计算XPath表达式。
In postfix notation, the need for parentheses is eliminated and the priority of the operators is no longer relevant. You can use the following algorithm to evaluate postfix expressions.
在后缀表达式中，不需要括号，而且操作符的优先级也不再起作用了。
To evaluate XPath expressions, passed as simple String objects, given a particular node in an instance of the supported data model to act as the context node.
要计算XPath表达式，将表达式作为简单的String对象传递，并给定所支持的数据模型实例中的某个节点作为上下文节点。
The type alternatives are evaluated in order until one of the XPath expressions evaluates to true (or, if none evaluate to true, the default type definition is chosen).
这些类型替换将依次执行计算，直到其中一个XPath表达式的值为true(如果值均不为true，则选择默认的类型定义)。
The sets of allowed and denied members must be MDX expressions that evaluate to sets of members of the dimension.
允许和拒绝的成员组必须是MDX表达式，表达式的计算结果为该维度的成员组。
The classic approach to writing code to evaluate arithmetic expressions was described by Donald Knuth in 1962 (see Resources). Knuth Outlines three steps.
编写代码对算术表达式求值的经典方法由DonaldKnuth描述于1962年(请参阅参考资料)。
This article examined an applet that has the ability to evaluate arithmetic expressions step by step.
本文分析了一个applet，它能一步一步的对算术表达式求值。
Some days ago a guy on the forum asked about how to evaluate at runtime simple mathematical expressions with support for symbols and function calls.
前段时间一个小伙子在论坛上询问如何在运行时计算简单的数学表达式，支持符号和函数调用。
Closed form expressions of auto-and cross-correlation functions of the novel pulses are also given, which are used to evaluate the performance of the correlator receiver.
为了评估相关接收机的性能，对设计脉冲信号的自相关和互相关函数的闭合表达式进行了推导；
The expressions are applied to evaluate the scattering from a wing post, and the results agree well with the measured data.
将该表达式用于分析涂层翼形柱体的散射，计算结果和测量结果有比较好的一致性。
Conclusions S100A4 may play important roles in lung cancer invasion and metastasis, their over expressions could act as a reference to evaluate metastasis and unfavorable prognosis of lung cancer.
结论S100A 4与肺癌的侵袭和转移有密切的关系，可以作为评估肺癌病人预后的重要指标。
As an example we will write a small program to read and evaluate arithmetic expressions consisting of floating point Numbers, parentheses and the usual operators for addition, subtraction, and so on.
作为例子，我们将要写一个计算由浮点数、圆括号及一些常用的加、减等算术符号组成的算术表达式的程序。
The QuickWatch dialog box lets you examine and evaluate variables and expressions.
对话方块能够让您检查及评估变数和运算式。
As an example we will write a small program to read and evaluate arithmetic expressions consisting of floating point Numbers, parentheses and the usual operators for addition, subtraction, and so on.
例如我们要写一个计算由浮点数、圆括号及一些常用的加、减等算术符号组成的算术表达式的程序。
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