double quotation marks

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。)

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。)

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。)

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。)

If you need quotation marks inside the alias, use double quotation marks.(如果您需要在别名中使用引号，那么可以使用双引号。)

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 is recommended that you enclose the trace mask with double quotation marks to avoid possible misinterpretation of the asterisk character by the operating-system shell.(建议您用双引号将跟踪屏蔽括起来，以免操作系统shell对星号发生错误判断。)

Values are enclosed by single or double quotation marks.(值用单引号或双引号括起来。)

Doing this, however, is generally a bad practice: It requires the name to always be enclosed in double quotation marks and can easily confuse someone else who may be maintaining your code.(但是，这么做通常是不好的做法：它要求名称总被括在双引号中，很容易把维护代码的其他人弄糊涂。)

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。)