Similar to %rep, it works at the assembler level, and it, too, is followed by an expression. For example, the above %rep construct is equivalent to this

与 %rep 相似，它也在汇编级起作用，后面也是一个表达式。

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C expression whose value is a string, including spacing, containing the assembler operation to identify the following data as read-only initialized data.

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。

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