它只保存一段数据：一个字符串、一个数字、未定义的值以及对另一个变量的引用。
They hold only one piece of data: a string, a number, the undefined value, a reference to another variable.
可以根据需要详细地定义规则，规则可以包含各种参数，从用户名和数据库类型到命令、时间段和计数。
Rules can be made as detailed as necessary and can include a wide range of parameters-from user names and database type to command, time period, and counts.
在数据库端，我也定义一个CHAR40字段。
On the database side I also have the field defined as a CHAR40.
未决的购买请求用了斜体，指出数据在别处定义（通常在用例的特殊需求段或在词汇表中定义）。
Pending purchase requests is italicized to indicate that the data is defined elsewhere (usually in the special requirements section of the use case or perhaps in a glossary).
这一段文档基于视觉，行为特征，数据模型以及用户体验定义了应用程序的三个样式。
This document identifies three application styles, based on visual and behavioral characteristics, data model, and user experience.
一个值为包括空格的字符串的C表达式，代表定义包含已初始化的只读数据段的汇编程序操作符。
C expression whose value is a string, including spacing, containing the assembler operation to identify the following data as read-only initialized data.
DSP软件系统采用链接命令文件，这个文件包含了DSP和目标板的存储器空间的定义以及代码段、数据段是如何分配到这些存储器空间的。
DSP software USES link command file. This file contains definition of memory of DSP and target board and how to distribute code segment and data segment to the memory.
本文在对质谱实验数据定量分析的基础上，首先明确和定义了肽段检测效率的概念。
In this dissertation, based on quantitative analysis of mass spectrometry experimental data, firstly we redefined the concept of peptide detection efficiency on the view of quantification.
本文在对质谱实验数据定量分析的基础上，首先明确和定义了肽段检测效率的概念。
In this dissertation, based on quantitative analysis of mass spectrometry experimental data, firstly we redefined the concept of peptide detection efficiency on the view of quantification.
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