它唯一的目的是在运行时检查给定的预定义符号是否被定义。
Its only purpose is to check at runtime whether or not the supplied preprocessor symbol is defined.
当现有资源包含了使用运算式而非简单整数定义符号值的符号定义时，您也可以使用包含的符号档。
You can also use included symbol files when you have existing resources with symbol definitions that use expressions rather than simple integers to define the symbol value.
Xerces-C++使用许多在头文件xercesc/util/XMLUni.hpp 中定义的预定义符号。
Xerces-C++ uses a number of predefined symbols that are defined in the header file, xercesc/util/XMLUni.hpp.
人类被定义为一种理性的存在，一种群居动物，一种可以制造工具的动物，或者一种制造符号的动物。
Man was defined as a rational being, as a social animal, an animal that can make tools, or a symbol-making animal.
使用下列代码来定义六个匹配精确字的标记和四个匹配符号的标记。
Use the code below to define six tokens that match exact words and four others that match symbols.
事件选择选项板包含许多由BPMN定义的事件类型的符号。
The event-selector palette contains symbols for many types of events defined by BPMN.
人类学家采用相当狭隘的定义，它要求具备利用符号传播文化知识的特征。
Anthropologists use a fairly specific definition that requires the use of symbols to transmit cultural knowledge.
它依赖于预定义的符号和类型定义，并且不容易进行修改或扩展。
It depends on predefined symbol and type definitions and is not easily modified or extended.
您可以在子工作区内创建一个新的对象（图表，符号，或者定义），并将其保存。
You can create a new object (diagram, symbol, or definition) in the child Workspace, and save it.
对于动态链接，多个库定义相同的符号没有问题。
With dynamic linking, it's not a problem to have multiple libraries that define the same symbol.
在某些模式中一些选项及符号元素可能失效了，所以选择合适的模式有助于为目标流程的执行环境定义适当的构件。
Some options and notational elements can be disabled in some modes, and selecting the appropriate model helps define appropriate artifacts for the target workflow execution environment.
UM L概要文件经常用于定义从uml符号衍生来的定义领域相关的符号。
UML profiles are often used to define domain-specific symbols derived from general UML symbols.
同时要注意，未定义的符号foo . fop . nope尽管没有赋值，但这样表示只是它本身的拼写。
Also notice that the undefined symbol foo.fop.nope simply stands for its own spelling, absent an assignment to the contrary.
清单7给出的宏定义使用这些函数定义了算术符号。
Listing 7 shows the macro definition to define math symbols using these functions.
如果一个没有后缀的16进制的常量是32位的，并且其高位被置位了，那么它就可以作为无符号整型进行定义。
Hexadecimal constants without a suffix are defined as an unsigned int if it will fit into 32-bits and if the high order bit is turned on.
符号设置文件已经定义，名为Symbols . txt，它不一定存在。
A symbol set file is defined, called Symbols.txt, that doesn't always exist.
lcomm conversion _ buffer, 16384保留16K空间，符号conversion _ buffer定义开始地址。
Lcomm conversion_buffer, 16384 reserves 16k of space, with the starting address defined in the symbol conversion_buffer.
/DBUILDING_DLL为这个特定的构建过程定义了 PRINT_API宏，以便从这个 DLL导出printHello符号。
exe or .obj.) /DBUILDING_DLL defines the PRINT_API macro for this particular building process so that the printHello symbol is exported from this DLL.
event命令也是一个方法调用，使用 符号（定义事件名）和闭包（定义转换）作为参数。
The event command is also a method invocation, taking a symbol (which defines the event's name) and a closure, which defines the transitions.
所以速度的符号,和平均加速度的符号,这二者都取决于,这里x正方向,是如何定义的,和0点的选取没有关系。
So the signs in the velocity and the signs in average acceleration depend crucially on how I have defined my increasing value of x not where I choose my zero points.
您可以通过定义保留的 d_whitespace()函数来控制空格的识别（它分离解析符号）；这样就使得您可以随意使用标记。
You can control white space recognition (that separates parse symbols) by defining the reserved d_whitespace() function; this enables you to tokenize however you like.
统一建模语言（Unified Modeling Language，UML）为用例定义图形符号，针对系统应该做什么，而不是如何去做。
The Unified Modeling Language (UML) defines a graphical notation for use cases, which focus on what a system should do rather than how it should do it.
这里，它允许你定义更多表达能力很强的符号，而不止是严格的相等（比如，检查一个组中某个元素的存在性）。
Here, it allows you to define more expressive notions than strict equality (testing the presence of an element in a set, for instance).
使用的任何符号都必须在外部进行定义。
可视化地设计对象是一个很好的实践，但当您试图交流设计决策时，不用定义明确的建模符号来设计会弊大于利。
Designing objects visually is a great practice, but doing it without a well-defined modeling notation can do more damage than good when you attempt to communicate design decisions.
这个索引列出了存档文件的成员(可重定位目标文件)所定义的每个符号。
The index lists each symbol, defined by a member of an archive, that is a relocatable object file.
如果我们希望所有位全部置位，那么一种可移植的方法是定义一个有符号的常数，其值为- 1。
If you want to turn all the bits on, a portable way to do this is to define a signed long constant with a value of -1.
首先，我建议以后写idl定义时不要再使用无符号整型。
First, I would say don't write new IDL definitions with unsigned integers.
清单5定义了空格、实际值、标识符和符号所使用的语法。
Listing 5 defines the rules for white space, real values, and identifiers and the symbols.
以一中定义良好的符号表示的模型是理解企业级方案系统的基础。
Models expressed in a well-defined notation are a cornerstone to understanding systems for enterprise-scale solutions.
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