In British English, single quotation marks are used.

在英国式的英语，单引号被用。

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。

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.

In the job definition, use two single quotation marks around strings.

在任务定义中, 用2个单引号包围字符串.

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。