即将离开知乎
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http://docs.racket-lang.org/reference/stx-patterns.html?q=define-syntax-rule#%28form._%28%28lib._racket%2Fprivate%2Fmisc..rkt%29._define-syntax-rule%29%29
您即将离开知乎,请注意您的帐号和财产安全。
http://docs.racket-lang.org/reference/stx-patterns.html?q=define-syntax-rule#%28form._%28%28lib._racket%2Fprivate%2Fmisc..rkt%29._define-syntax-rule%29%29