当时他们引号的用法的生活很艰难。
第三件要注意的事是括起'd'命令的单引号的用法。
The third thing to notice is the use of single quotes to surround the 'd' command.
请注意比较中XML实体的用法，这种用法的目的是为了转义引号字符。
Note the use of XML entitities within the comparison, in order to escape the quotation characters.
引号的特指用法大致可分为两大类：一类是非修辞特指，一类是修辞特指。
The usage of particularly-referring quotation marks can be roughly divided into two classes of the non-rhetorical one and the rhetorical one.
引号的特指用法大致可分为两大类：一类是非修辞特指，一类是修辞特指。
The usage of particularly-referring quotation marks can be roughly divided into two classes of the non-rhetorical one and the rhetorical one.
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