You might think that defn is a keyword of the language, but it is actually a macro.

您可能会认为defn是此语言的关键字，但它实际上是个宏。

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In a syntax-rules macro, define-syntax is the keyword used to define a macro transformation.

在syntax - rules宏中，define - syntax是用来定义宏转换的关键字。

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What this form does is defines macro-name to be a keyword used for transformation.

这种形式将macro - name定义为用于进行转换的关键字。

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