defn
美
英 
例句
Thus, defn is not part of the language specification but it is added by the language's core library.
也就是说,defn并不是此语言规范的一部分,而是通过此语言的核心库被添加上的。
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。