The single quotation marks are required.
需要使用单引号。
Single quotation marks must delimit each alias.
必须使用单引号确定每个别名的界限。
Enclose text values in single quotation marks.
用单引号将文本值括起来。
In British English, single quotation marks are used.
在英国式的英语，单引号被用。
Remember to enclose 'yes' and 'no' in single quotation marks.
记住用单引号括住'yes'和 'no'。
If the single quotation mark is the outermost quote, no variables are expanded.
如果最外边的引号是单引号，那么不展开变量。
The single quotation mark ('), however, does not provide this functionality.
但是，单引号(')不提供此功能。
One workaround is simply to use single quotation marks: 'denoncourt \ retail \ controller'.
一种解决方法是使用单引号：'denoncourt \retail \controller '。
Incorporate quotations of three lines or less into the text, within single quotation marks.
文本中三行或更少的合并的引用语，用单引号。
If the parameter is a string or character type enclose the parameter in single quotation marks.
如果参数为字符串类型或字符类型，则应将该参数放在单引号中。
Do not use quotation marks, except for single quotation marks round quotations within quotations.
除了引用之中再引用的单引号外，不用引号。
If you start a string with a single quotation mark, you must end with a single quotation mark, and vice versa.
如果字符串是以单引号开始，那么必须以单引号结束，反之亦然。
That function USES a regular expression to change a single quotation mark into backslashed single quotation mark.
该函数使用一个正则表达式将一个单引号标记更改为带有反斜杠的单引号标记。
That is, reference columns by typing their names, enclose literal text in single quotation marks, and so on.
即键入列名引用列，用单引号括起文本，等等。
When working with string data, you can use either double quotation marks or single quotation marks to delimit them.
在处理字符串数据时，可以使用双引号或单引号分隔。
Here, the single quotation marks around the argument keep it intact, preventing the shell from interpreting + and %.
在本示例中，参数周围的单引号用于保持参数不变，从而可以避免Shell 对 + 和 %进行解释。
Both codes are enclosed in single quotation marks to prevent the shell from interpolating characters that have special meaning.
这两个编码均放在单引号内，以防止shell篡改有特殊含义的字符。
Any values containing a semicolon, single quotation marks, or double quotation marks must be enclosed in double quotation marks.
任何包含分号、单引号或双引号的值必须用双引号引起来。
The single quotation mark in front of the null list is used to tell Scheme that you are using as data and not as a part of your parse tree.
空列表前面的单引号用来告诉scheme您正在使用作为数据，而不是用它作为解析树的一部分。
To be accessed properly, the JDBC URL must be passed into the connect command as a string; hence it's enclosed in single quotation mark (') characters.
要正确访问，必须将JDBCURL作为字符串传递给connect命令；因此需要将其封装在单引号(')字符里。
By default, SGML requires that all attribute values be delimited using either double quotation marks (ASCII decimal 34) or single quotation marks (ASCII decimal 39).
默认情况下，SGML要求所有的属性值用双引号(十进制ascii值34)或者单引号(十进制ascii值39)来分隔。
You can also simply enclose the entire variable value in single quotation marks (') as long as you precede any actual single quotation marks in the variable with a backslash (\ ').
您还可以简单地将整个字符串放到单引号(')中，但是需要在变量中真正的单引号字符前面加上一个反斜线(\ ')。
First, you can mix single and double quotation marks when creating a string, as long as the string USES the same type of quotation mark at the beginning and end.
第一，在创建字符串时，您可以混合使用单引号和双引号，只要字符串在开始位置和结束位置使用同一类型的引号。
Look closely at command 6: Because the value is not placed in quotation marks (either single or double), whitespace is not protected.
仔细看一下命令6：因为值没有放在引号(单引号或双引号)中，所以不保留空格。
If a variable contains whitespace, the double quotation marks keep the variable expansion intact as a single argument.
如果一个变量包含空格，双引号会按原样把变量展开为一个参数。
Certainly, all three operators-the single, double, and back quotation marks-serve a valid purpose, but like exceptions in English, memorizing and mastering the variations can be maddening.
当然，这三种操作符(单引号、双引号和反撇号)都有合法的用途，但是与英语中的例外一样，记住和掌握这些细微差异很令人头疼。
This explains why an unmatched single or double quotation mark causes a new prompt to appear.
这解释了不匹配的单引号或双引号会导致出现新提示符的原因。
Within in the string, you can use as many single and double quotation marks as you like (see Listing 4).
在该字符串中，您可以使用任意多的单引号和双引号(参见清单4)。
It's worth noting that strings are encoded using single or double quotation marks.
另外一点值得注意的是字符串是通过单引号或双引号被编码的。
The strings I've been creating using the single, double, or triple quotation mark syntax are still string objects.
使用单引号、双引号和三引号语法创建的字符串仍然是字符串对象。
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